Destramic Posted June 17, 2010 Share Posted June 17, 2010 hey guys im trying to make an image captcha script for the fisrt time im having a problem getting it to work...its returning Fatal error: Call to undefined function imagecreate() in C:\www\functions\captcha _image_verification.php on line 41 does anyone know why...im sure im using the right syntex <?php function image_captcha_verification() { $font_size = "14"; $border_colour = "239, 239, 239"; $background_colour = "255, 255, 255, 127"; $text_colour = "191, 120, 120"; $font = "verdana.ttf"; $width = "100"; $height = "100"; $words = array ("police", "time", "broadway", "is", "throughout", "hateful", "action", "duvet", "tailcoat", "the", "danger", "minster", "army", "dent", "share", "beard", "lazy", "year", "must", "resigned", "angry", "relapse", "trump", "union", "adventure", "honey", "inject", "special", "end", "crossing", "slow", "grunge", "prize", "of", "dreamer", "issues", "tomcat", "riverbed", "founder", "working", "mask", "spinned", "reported", "meets", "john", "by", "vogue", "said", "jumpy", "democratic", "kingdom", "combs", "moments", "peaks", "rise", "innocent", "chalked", "from", "relations", "removing", "platform", "unwillingness", "secretary", "computer", "arranger", "mentor", "was", "quote", "warn", "rally", "squadron", "profiles", "immature", "in", "drives", "train", "intrude", "state", "defense", "past", "plunges", "cry", "cameras", "promises", "outskirt", "subtitles", "hidden", "logic", "advertisement", "exact", "dimond", "risk", "director", "back", "sinatra", "store", "stopgap", "equal", "housing", "airport", "him", "security", "one", "dodges", "development", "entertainer", "ignition", "lovebird", "counts", "world", "protocol", "than", "cry", "shannon", "shear", "drain", "blues", "morning", "fronting", "executive", "person", "reached", "taxplayer", "stranger", "schedules", "preston", "historic", "featured", "port", "tricked", "announced", "can", "time", "loadable", "wallets", "wounded", "core", "empire", "towers", "wished", "confused", "who", "hurdles", "toggles", "martin", "defender", "plane", "decked", "but", "harp", "ribs", "helpers", "least", "column", "cement", "room", "tension", "clipper", "shudder", "dangles", "storm", "farms", "zero", "affairs", "maniacs", "proposals", "two", "surrounded", "bone", "difficult", "dusters", "sailed", "bonding", "speak", "however", "sands", "scribble", "maiden", "mouths", "arms", "coopered", "learned", "recieved", "rocks", "tripod", "skull", "dwarf", "number", "arrested", "squish", "singer", "buttered", "found", "new", "million", "token", "combo", "completed", "national", "markets", "because", "lower", "trainers", "chief", "angle", "seabed", "trickled", "firsy", "undated", "ludlow", "stones", "joker", "monster", "reach", "outlook", "aware", "among", "comfort", "living", "contact", "french", "thailand", "open", "yelps", "delayed", "smart", "metropolitan", "meter", "snow", "castle", "tools", "irrigration", "new", "gas", "sidestepping", "drys", "cartoons", "declared", "numskull", "brass", "sped", "washington", "landing", "ordeal", "cops", "quiet", "strike", "destruct", "wrote", "mamma", "tunes", "balanced", "officers", "books", "flame", "am", "fishing", "not", "inspires", "beehives", "hypnotic", "flops", "sandhurst", "invoked", "bullion", "christmas", "muttered", "moats", "baggy", "ginger", "obligated", "hangover", "building", "midland", "mocks", "heavy", "don", "quotable", "clarkson", "vary", "enriches", "romania", "sumo", "ushering", "votes", "cool", "resumed", "sprayers", "convents", "unchanging", "prove", "renshaw", "holy", "recited", "kingpins", "valiant", "yesterday", "withdrawel", "itself", "slog", "marry", "newborns"); $image = imagecreate($width, $height); $background = imagecolorallocatealpha($image, $background_colour); $text = imagecolorallocate($image, $text_colour); imagefill($image, 0, 0, $background); imagefilledrectangle($image, 0, 0, $width - 1, $height - 1, $border_colour); $string = rand($words); $angl = "5"; $x_coordinate = "24"; $y_coordinate = "24"; imagettftext($image, $font_size, $angle, $x_coordinate, $y_coordinate, $text_colour, $font, $string); header("Content-type: image/png"); imagepng($image); imagedestroy($image); } image_captcha_verification(); ?> Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/ Share on other sites More sharing options...
Alex Posted June 17, 2010 Share Posted June 17, 2010 Are you sure you have the GD library installed? Use phpinfo to see if you do. Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/#findComment-1073558 Share on other sites More sharing options...
Destramic Posted June 17, 2010 Author Share Posted June 17, 2010 thanks alex that was the problem thanks...now the other problem im having is that the background is black on the image and i cant see no text idealy i need the image to be transparant if possible <?php function image_captcha_verification() { $font_size = "14"; $border_colour = "239, 239, 239"; $background_colour = "255, 255, 255, 127"; $text_colour = "191, 120, 120"; $font = "verdana.ttf"; $width = "350"; $height = "80"; $words = array ("police", "time", "broadway", "is", "throughout", "hateful", "action", "duvet", "tailcoat", "the", "danger", "minster", "army", "dent", "share", "beard", "lazy", "year", "must", "resigned", "angry", "relapse", "trump", "union", "adventure", "honey", "inject", "special", "end", "crossing", "slow", "grunge", "prize", "of", "dreamer", "issues", "tomcat", "riverbed", "founder", "working", "mask", "spinned", "reported", "meets", "john", "by", "vogue", "said", "jumpy", "democratic", "kingdom", "combs", "moments", "peaks", "rise", "innocent", "chalked", "from", "relations", "removing", "platform", "unwillingness", "secretary", "computer", "arranger", "mentor", "was", "quote", "warn", "rally", "squadron", "profiles", "immature", "in", "drives", "train", "intrude", "state", "defense", "past", "plunges", "cry", "cameras", "promises", "outskirt", "subtitles", "hidden", "logic", "advertisement", "exact", "dimond", "risk", "director", "back", "sinatra", "store", "stopgap", "equal", "housing", "airport", "him", "security", "one", "dodges", "development", "entertainer", "ignition", "lovebird", "counts", "world", "protocol", "than", "cry", "shannon", "shear", "drain", "blues", "morning", "fronting", "executive", "person", "reached", "taxplayer", "stranger", "schedules", "preston", "historic", "featured", "port", "tricked", "announced", "can", "time", "loadable", "wallets", "wounded", "core", "empire", "towers", "wished", "confused", "who", "hurdles", "toggles", "martin", "defender", "plane", "decked", "but", "harp", "ribs", "helpers", "least", "column", "cement", "room", "tension", "clipper", "shudder", "dangles", "storm", "farms", "zero", "affairs", "maniacs", "proposals", "two", "surrounded", "bone", "difficult", "dusters", "sailed", "bonding", "speak", "however", "sands", "scribble", "maiden", "mouths", "arms", "coopered", "learned", "recieved", "rocks", "tripod", "skull", "dwarf", "number", "arrested", "squish", "singer", "buttered", "found", "new", "million", "token", "combo", "completed", "national", "markets", "because", "lower", "trainers", "chief", "angle", "seabed", "trickled", "firsy", "undated", "ludlow", "stones", "joker", "monster", "reach", "outlook", "aware", "among", "comfort", "living", "contact", "french", "thailand", "open", "yelps", "delayed", "smart", "metropolitan", "meter", "snow", "castle", "tools", "irrigration", "new", "gas", "sidestepping", "drys", "cartoons", "declared", "numskull", "brass", "sped", "washington", "landing", "ordeal", "cops", "quiet", "strike", "destruct", "wrote", "mamma", "tunes", "balanced", "officers", "books", "flame", "am", "fishing", "not", "inspires", "beehives", "hypnotic", "flops", "sandhurst", "invoked", "bullion", "christmas", "muttered", "moats", "baggy", "ginger", "obligated", "hangover", "building", "midland", "mocks", "heavy", "don", "quotable", "clarkson", "vary", "enriches", "romania", "sumo", "ushering", "votes", "cool", "resumed", "sprayers", "convents", "unchanging", "prove", "renshaw", "holy", "recited", "kingpins", "valiant", "yesterday", "withdrawel", "itself", "slog", "marry", "newborns"); $image = imagecreate($width, $height); $background = imagecolorallocatealpha($image, 255, 255, 255, 127); $text = imagecolorallocate($image, 20, 40, 100); imagefill($image, 0, 0, $background); imagefilledrectangle($image, 0, 0, $width - 1, $height - 1, $border_colour); $string = "test 123!"; $angl = "5"; $x_coordinates = "24"; $y_coordinates = "24"; imagettftext($image, $font_size, $angle, $x_coordinates, $y_coordinates, $text_colour, $font, $string); header("Content-type: image/png"); imagepng($image); imagedestroy($image); } image_captcha_verification(); ?> Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/#findComment-1073635 Share on other sites More sharing options...
Alex Posted June 17, 2010 Share Posted June 17, 2010 You can use imagecolortransparent to set a color to transparent on the image. Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/#findComment-1073640 Share on other sites More sharing options...
Destramic Posted June 18, 2010 Author Share Posted June 18, 2010 ive tried to set the transparentcey but its not working...also i think im having a problem with text and border colour <?php function image_captcha_verification($width = NULL, $height = NULL, $words = NULL) { $font_size = "18"; $border_colour = "239, 239, 239"; $font = "verdana.ttf"; $width = "400"; $height = "80"; $words = array ("police", "time", "broadway", "is", "throughout", "hateful", "action", "duvet", "tailcoat", "the", "danger", "minster", "army", "dent", "share", "beard", "lazy", "year", "must", "resigned", "angry", "relapse", "trump", "union", "adventure", "honey", "inject", "special", "end", "crossing", "slow", "grunge", "prize", "of", "dreamer", "issues", "tomcat", "riverbed", "founder", "working", "mask", "spinned", "reported", "meets", "john", "by", "vogue", "said", "jumpy", "democratic", "kingdom", "combs", "moments", "peaks", "rise", "innocent", "chalked", "from", "relations", "removing", "platform", "unwillingness", "secretary", "computer", "arranger", "mentor", "was", "quote", "warn", "rally", "squadron", "profiles", "immature", "in", "drives", "train", "intrude", "state", "defense", "past", "plunges", "cry", "cameras", "promises", "outskirt", "subtitles", "hidden", "logic", "advertisement", "exact", "dimond", "risk", "director", "back", "sinatra", "store", "stopgap", "equal", "housing", "airport", "him", "security", "one", "dodges", "development", "entertainer", "ignition", "lovebird", "counts", "world", "protocol", "than", "cry", "shannon", "shear", "drain", "blues", "morning", "fronting", "executive", "person", "reached", "taxplayer", "stranger", "schedules", "preston", "historic", "featured", "port", "tricked", "announced", "can", "time", "loadable", "wallets", "wounded", "core", "empire", "towers", "wished", "confused", "who", "hurdles", "toggles", "martin", "defender", "plane", "decked", "but", "harp", "ribs", "helpers", "least", "column", "cement", "room", "tension", "clipper", "shudder", "dangles", "storm", "farms", "zero", "affairs", "maniacs", "proposals", "two", "surrounded", "bone", "difficult", "dusters", "sailed", "bonding", "speak", "however", "sands", "scribble", "maiden", "mouths", "arms", "coopered", "learned", "recieved", "rocks", "tripod", "skull", "dwarf", "number", "arrested", "squish", "singer", "buttered", "found", "new", "million", "token", "combo", "completed", "national", "markets", "because", "lower", "trainers", "chief", "angle", "seabed", "trickled", "firsy", "undated", "ludlow", "stones", "joker", "monster", "reach", "outlook", "aware", "among", "comfort", "living", "contact", "french", "thailand", "open", "yelps", "delayed", "smart", "metropolitan", "meter", "snow", "castle", "tools", "irrigration", "new", "gas", "sidestepping", "drys", "cartoons", "declared", "numskull", "brass", "sped", "washington", "landing", "ordeal", "cops", "quiet", "strike", "destruct", "wrote", "mamma", "tunes", "balanced", "officers", "books", "flame", "am", "fishing", "not", "inspires", "beehives", "hypnotic", "flops", "sandhurst", "invoked", "bullion", "christmas", "muttered", "moats", "baggy", "ginger", "obligated", "hangover", "building", "midland", "mocks", "heavy", "don", "quotable", "clarkson", "vary", "enriches", "romania", "sumo", "ushering", "votes", "cool", "resumed", "sprayers", "convents", "unchanging", "prove", "renshaw", "holy", "recited", "kingpins", "valiant", "yesterday", "withdrawel", "itself", "slog", "marry", "newborns"); $image = imagecreatetruecolor($width, $height); $background = imagecolorallocatealpha($image, 255, 0, 0, 0); $text = imagecolorallocate($image, 20, 40, 100); imagefill($image, 0, 0, $background); imagefilledrectangle($image, 0, 0, $width - 1, $height - 1, $border_colour); imagecolortransparent($image, $background); $random_key = array_rand($words, 2); $string = $words[$random_key[0]] . " " . $words[$random_key[1]]; $array = preg_split("//", $string, -1); $array_length = count($array) - 1; for($i = 1; $i < $array_length; $i++) { $letter = $array[$i]; if ($letter == " ") { // ucfirst //lcfirst //strtolower //strtoupper //ucwords } $letter_spacer = 25 * $i; $angle = rand(1, 25); $x_coordinates = 50 + $letter_spacer; $y_coordinates = ($height / 2); imagettftext($image, $font_size, $angle, $x_coordinates, $y_coordinates, $text_colour, $font, $letter); } session_start(); $_SESSION['captcha_code'] = md5($string); header("Content-type: image/png"); imagepng($image); imagedestroy($image); } image_captcha_verification(); ?> Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/#findComment-1074036 Share on other sites More sharing options...
Alex Posted June 18, 2010 Share Posted June 18, 2010 <?php function image_captcha_verification($width = NULL, $height = NULL, $words = NULL) { $font_size = "18"; $border_colour = "239, 239, 239"; $font = "verdana.ttf"; $width = "400"; $height = "80"; $words = array ("police", "time", "broadway", "is", "throughout", "hateful", "action", "duvet", "tailcoat", "the", "danger", "minster", "army", "dent", "share", "beard", "lazy", "year", "must", "resigned", "angry", "relapse", "trump", "union", "adventure", "honey", "inject", "special", "end", "crossing", "slow", "grunge", "prize", "of", "dreamer", "issues", "tomcat", "riverbed", "founder", "working", "mask", "spinned", "reported", "meets", "john", "by", "vogue", "said", "jumpy", "democratic", "kingdom", "combs", "moments", "peaks", "rise", "innocent", "chalked", "from", "relations", "removing", "platform", "unwillingness", "secretary", "computer", "arranger", "mentor", "was", "quote", "warn", "rally", "squadron", "profiles", "immature", "in", "drives", "train", "intrude", "state", "defense", "past", "plunges", "cry", "cameras", "promises", "outskirt", "subtitles", "hidden", "logic", "advertisement", "exact", "dimond", "risk", "director", "back", "sinatra", "store", "stopgap", "equal", "housing", "airport", "him", "security", "one", "dodges", "development", "entertainer", "ignition", "lovebird", "counts", "world", "protocol", "than", "cry", "shannon", "shear", "drain", "blues", "morning", "fronting", "executive", "person", "reached", "taxplayer", "stranger", "schedules", "preston", "historic", "featured", "port", "tricked", "announced", "can", "time", "loadable", "wallets", "wounded", "core", "empire", "towers", "wished", "confused", "who", "hurdles", "toggles", "martin", "defender", "plane", "decked", "but", "harp", "ribs", "helpers", "least", "column", "cement", "room", "tension", "clipper", "shudder", "dangles", "storm", "farms", "zero", "affairs", "maniacs", "proposals", "two", "surrounded", "bone", "difficult", "dusters", "sailed", "bonding", "speak", "however", "sands", "scribble", "maiden", "mouths", "arms", "coopered", "learned", "recieved", "rocks", "tripod", "skull", "dwarf", "number", "arrested", "squish", "singer", "buttered", "found", "new", "million", "token", "combo", "completed", "national", "markets", "because", "lower", "trainers", "chief", "angle", "seabed", "trickled", "firsy", "undated", "ludlow", "stones", "joker", "monster", "reach", "outlook", "aware", "among", "comfort", "living", "contact", "french", "thailand", "open", "yelps", "delayed", "smart", "metropolitan", "meter", "snow", "castle", "tools", "irrigration", "new", "gas", "sidestepping", "drys", "cartoons", "declared", "numskull", "brass", "sped", "washington", "landing", "ordeal", "cops", "quiet", "strike", "destruct", "wrote", "mamma", "tunes", "balanced", "officers", "books", "flame", "am", "fishing", "not", "inspires", "beehives", "hypnotic", "flops", "sandhurst", "invoked", "bullion", "christmas", "muttered", "moats", "baggy", "ginger", "obligated", "hangover", "building", "midland", "mocks", "heavy", "don", "quotable", "clarkson", "vary", "enriches", "romania", "sumo", "ushering", "votes", "cool", "resumed", "sprayers", "convents", "unchanging", "prove", "renshaw", "holy", "recited", "kingpins", "valiant", "yesterday", "withdrawel", "itself", "slog", "marry", "newborns"); $image = imagecreatetruecolor($width, $height); $background = imagecolorallocate($image, 255, 0, 0); $text = imagecolorallocate($image, 20, 40, 100); imagefill($image, 0, 0, $background); //imagefilledrectangle($image, 0, 0, $width - 1, $height - 1, $border_colour); imagecolortransparent($image, $background); $random_key = array_rand($words, 2); $string = $words[$random_key[0]] . " " . $words[$random_key[1]]; $array = preg_split("//", $string, -1); $array_length = count($array) - 1; for($i = 1; $i < $array_length; $i++) { $letter = $array[$i]; if ($letter == " ") { // ucfirst //lcfirst //strtolower //strtoupper //ucwords } $letter_spacer = 25 * $i; $angle = rand(1, 25); $x_coordinates = 50 + $letter_spacer; $y_coordinates = ($height / 2); imagettftext($image, $font_size, $angle, $x_coordinates, $y_coordinates, $text_colour, $font, $letter); } session_start(); $_SESSION['captcha_code'] = md5($string); header("Content-type: image/png"); imagepng($image); imagedestroy($image); } image_captcha_verification(); ?> Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/#findComment-1074038 Share on other sites More sharing options...
Destramic Posted June 20, 2010 Author Share Posted June 20, 2010 thanks that worked great....is there also a way of getting a border when having a transparent background? Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/#findComment-1074729 Share on other sites More sharing options...
Alex Posted June 20, 2010 Share Posted June 20, 2010 Of course. Use imagerectangle instead of imagefilledrectangle. Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/#findComment-1074732 Share on other sites More sharing options...
s1rspyr0 Posted June 21, 2010 Share Posted June 21, 2010 see if this helps, maybe you can use by example... *NOTE* This is set up as a class.... <?php // start a PHP session - this class uses sessions to store the generated // code. Comment out if you are calling already from your application session_start(); // class defaults - change to effect globally define('CAPTCHA_SESSION_ID', 'php_captcha'); define('CAPTCHA_WIDTH', 200); // max 500 define('CAPTCHA_HEIGHT', 50); // max 200 define('CAPTCHA_NUM_CHARS', 4); define('CAPTCHA_NUM_LINES', 70); define('CAPTCHA_CHAR_SHADOW', false); define('CAPTCHA_OWNER_TEXT', ''); define('CAPTCHA_CHAR_SET', 'A-Z'); // defaults to A-Z define('CAPTCHA_CASE_INSENSITIVE', true); define('CAPTCHA_BACKGROUND_IMAGES', ''); define('CAPTCHA_MIN_FONT_SIZE', 20); define('CAPTCHA_MAX_FONT_SIZE', 25); define('CAPTCHA_USE_COLOUR', false); define('CAPTCHA_FILE_TYPE', 'jpeg'); define('CAPTCHA_FLITE_PATH', '/usr/bin/flite'); define('CAPTCHA_AUDIO_PATH', '/tmp/'); // must be writeable by PHP process /************************ End Default Options **********************/ // don't edit below this line (unless you want to change the class!) class PhpCaptcha { var $oImage; var $aFonts; var $iWidth; var $iHeight; var $iNumChars; var $iNumLines; var $iSpacing; var $bCharShadow; var $sOwnerText; var $aCharSet; var $bCaseInsensitive; var $vBackgroundImages; var $iMinFontSize; var $iMaxFontSize; var $bUseColour; var $sFileType; var $sCode = ''; function PhpCaptcha( $aFonts, // array of TrueType fonts to use - specify full path $iWidth = CAPTCHA_WIDTH, // width of image $iHeight = CAPTCHA_HEIGHT // height of image ) { // get parameters $this->aFonts = $aFonts; $this->SetNumChars(CAPTCHA_NUM_CHARS); $this->SetNumLines(CAPTCHA_NUM_LINES); $this->DisplayShadow(CAPTCHA_CHAR_SHADOW); $this->SetOwnerText(CAPTCHA_OWNER_TEXT); $this->SetCharSet(CAPTCHA_CHAR_SET); $this->CaseInsensitive(CAPTCHA_CASE_INSENSITIVE); $this->SetBackgroundImages(CAPTCHA_BACKGROUND_IMAGES); $this->SetMinFontSize(CAPTCHA_MIN_FONT_SIZE); $this->SetMaxFontSize(CAPTCHA_MAX_FONT_SIZE); $this->UseColour(CAPTCHA_USE_COLOUR); $this->SetFileType(CAPTCHA_FILE_TYPE); $this->SetWidth($iWidth); $this->SetHeight($iHeight); } function CalculateSpacing() { $this->iSpacing = (int)($this->iWidth / $this->iNumChars); } function SetWidth($iWidth) { $this->iWidth = $iWidth; if ($this->iWidth > 500) $this->iWidth = 500; // to prevent perfomance impact $this->CalculateSpacing(); } function SetHeight($iHeight) { $this->iHeight = $iHeight; if ($this->iHeight > 200) $this->iHeight = 200; // to prevent performance impact } function SetNumChars($iNumChars) { $this->iNumChars = $iNumChars; $this->CalculateSpacing(); } function SetNumLines($iNumLines) { $this->iNumLines = $iNumLines; } function DisplayShadow($bCharShadow) { $this->bCharShadow = $bCharShadow; } function SetOwnerText($sOwnerText) { $this->sOwnerText = $sOwnerText; } function SetCharSet($vCharSet) { // check for input type if (is_array($vCharSet)) { $this->aCharSet = $vCharSet; } else { if ($vCharSet != '') { // split items on commas $aCharSet = explode(',', $vCharSet); // initialise array $this->aCharSet = array(); // loop through items foreach ($aCharSet as $sCurrentItem) { // a range should have 3 characters, otherwise is normal character if (strlen($sCurrentItem) == 3) { // split on range character $aRange = explode('-', $sCurrentItem); // check for valid range if (count($aRange) == 2 && $aRange[0] < $aRange[1]) { // create array of characters from range $aRange = range($aRange[0], $aRange[1]); // add to charset array $this->aCharSet = array_merge($this->aCharSet, $aRange); } } else { $this->aCharSet[] = $sCurrentItem; } } } } } function CaseInsensitive($bCaseInsensitive) { $this->bCaseInsensitive = $bCaseInsensitive; } function SetBackgroundImages($vBackgroundImages) { $this->vBackgroundImages = $vBackgroundImages; } function SetMinFontSize($iMinFontSize) { $this->iMinFontSize = $iMinFontSize; } function SetMaxFontSize($iMaxFontSize) { $this->iMaxFontSize = $iMaxFontSize; } function UseColour($bUseColour) { $this->bUseColour = $bUseColour; } function SetFileType($sFileType) { // check for valid file type if (in_array($sFileType, array('gif', 'png', 'jpeg'))) { $this->sFileType = $sFileType; } else { $this->sFileType = 'jpeg'; } } function DrawLines() { for ($i = 0; $i < $this->iNumLines; $i++) { // allocate colour if ($this->bUseColour) { $iLineColour = imagecolorallocate($this->oImage, rand(100, 250), rand(100, 250), rand(100, 250)); } else { $iRandColour = rand(100, 250); $iLineColour = imagecolorallocate($this->oImage, $iRandColour, $iRandColour, $iRandColour); } // draw line imageline($this->oImage, rand(0, $this->iWidth), rand(0, $this->iHeight), rand(0, $this->iWidth), rand(0, $this->iHeight), $iLineColour); } } function DrawOwnerText() { // allocate owner text colour $iBlack = imagecolorallocate($this->oImage, 0, 0, 0); // get height of selected font $iOwnerTextHeight = imagefontheight(2); // calculate overall height $iLineHeight = $this->iHeight - $iOwnerTextHeight - 4; // draw line above text to separate from CAPTCHA imageline($this->oImage, 0, $iLineHeight, $this->iWidth, $iLineHeight, $iBlack); // write owner text imagestring($this->oImage, 2, 3, $this->iHeight - $iOwnerTextHeight - 3, $this->sOwnerText, $iBlack); // reduce available height for drawing CAPTCHA $this->iHeight = $this->iHeight - $iOwnerTextHeight - 5; } function GenerateCode() { // reset code $this->sCode = ''; // loop through and generate the code letter by letter for ($i = 0; $i < $this->iNumChars; $i++) { if (count($this->aCharSet) > 0) { // select random character and add to code string $this->sCode .= $this->aCharSet[array_rand($this->aCharSet)]; } else { // select random character and add to code string $this->sCode .= chr(rand(65, 90)); } } // save code in session variable if ($this->bCaseInsensitive) { $_SESSION[CAPTCHA_SESSION_ID] = strtoupper($this->sCode); } else { $_SESSION[CAPTCHA_SESSION_ID] = $this->sCode; } } function DrawCharacters() { // loop through and write out selected number of characters for ($i = 0; $i < strlen($this->sCode); $i++) { // select random font $sCurrentFont = $this->aFonts[array_rand($this->aFonts)]; // select random colour if ($this->bUseColour) { $iTextColour = imagecolorallocate($this->oImage, rand(0, 100), rand(0, 100), rand(0, 100)); if ($this->bCharShadow) { // shadow colour $iShadowColour = imagecolorallocate($this->oImage, rand(0, 100), rand(0, 100), rand(0, 100)); } } else { $iRandColour = rand(0, 100); $iTextColour = imagecolorallocate($this->oImage, $iRandColour, $iRandColour, $iRandColour); if ($this->bCharShadow) { // shadow colour $iRandColour = rand(0, 100); $iShadowColour = imagecolorallocate($this->oImage, $iRandColour, $iRandColour, $iRandColour); } } // select random font size $iFontSize = rand($this->iMinFontSize, $this->iMaxFontSize); // select random angle $iAngle = rand(-30, 30); // get dimensions of character in selected font and text size $aCharDetails = imageftbbox($iFontSize, $iAngle, $sCurrentFont, $this->sCode[$i], array()); // calculate character starting coordinates $iX = $this->iSpacing / 4 + $i * $this->iSpacing; $iCharHeight = $aCharDetails[2] - $aCharDetails[5]; $iY = $this->iHeight / 2 + $iCharHeight / 4; // write text to image imagefttext($this->oImage, $iFontSize, $iAngle, $iX, $iY, $iTextColour, $sCurrentFont, $this->sCode[$i], array()); if ($this->bCharShadow) { $iOffsetAngle = rand(-30, 30); $iRandOffsetX = rand(-5, 5); $iRandOffsetY = rand(-5, 5); imagefttext($this->oImage, $iFontSize, $iOffsetAngle, $iX + $iRandOffsetX, $iY + $iRandOffsetY, $iShadowColour, $sCurrentFont, $this->sCode[$i], array()); } } } function WriteFile($sFilename) { if ($sFilename == '') { // tell browser that data is jpeg header("Content-type: image/$this->sFileType"); } switch ($this->sFileType) { case 'gif': $sFilename != '' ? imagegif($this->oImage, $sFilename) : imagegif($this->oImage); break; case 'png': $sFilename != '' ? imagepng($this->oImage, $sFilename) : imagepng($this->oImage); break; default: $sFilename != '' ? imagejpeg($this->oImage, $sFilename) : imagejpeg($this->oImage); } } function Create($sFilename = '') { // check for required gd functions if (!function_exists('imagecreate') || !function_exists("image$this->sFileType") || ($this->vBackgroundImages != '' && !function_exists('imagecreatetruecolor'))) { return false; } // get background image if specified and copy to CAPTCHA if (is_array($this->vBackgroundImages) || $this->vBackgroundImages != '') { // create new image $this->oImage = imagecreatetruecolor($this->iWidth, $this->iHeight); // create background image if (is_array($this->vBackgroundImages)) { $iRandImage = array_rand($this->vBackgroundImages); $oBackgroundImage = imagecreatefromjpeg($this->vBackgroundImages[$iRandImage]); } else { $oBackgroundImage = imagecreatefromjpeg($this->vBackgroundImages); } // copy background image imagecopy($this->oImage, $oBackgroundImage, 0, 0, 0, 0, $this->iWidth, $this->iHeight); // free memory used to create background image imagedestroy($oBackgroundImage); } else { // create new image $this->oImage = imagecreate($this->iWidth, $this->iHeight); } // allocate white background colour imagecolorallocate($this->oImage, 255, 255, 255); // check for owner text if ($this->sOwnerText != '') { $this->DrawOwnerText(); } // check for background image before drawing lines if (!is_array($this->vBackgroundImages) && $this->vBackgroundImages == '') { $this->DrawLines(); } $this->GenerateCode(); $this->DrawCharacters(); // write out image to file or browser $this->WriteFile($sFilename); // free memory used in creating image imagedestroy($this->oImage); return true; } // call this method statically function Validate($sUserCode, $bCaseInsensitive = true) { if ($bCaseInsensitive) { $sUserCode = strtoupper($sUserCode); } if (!empty($_SESSION[CAPTCHA_SESSION_ID]) && $sUserCode == $_SESSION[CAPTCHA_SESSION_ID]) { // clear to prevent re-use unset($_SESSION[CAPTCHA_SESSION_ID]); return true; } return false; } } // this class will only work correctly if a visual CAPTCHA has been created first using PhpCaptcha class AudioPhpCaptcha { var $sFlitePath; var $sAudioPath; var $sCode; function AudioPhpCaptcha( $sFlitePath = CAPTCHA_FLITE_PATH, // path to flite binary $sAudioPath = CAPTCHA_AUDIO_PATH // the location to temporarily store the generated audio CAPTCHA ) { $this->SetFlitePath($sFlitePath); $this->SetAudioPath($sAudioPath); // retrieve code if already set by previous instance of visual PhpCaptcha if (isset($_SESSION[CAPTCHA_SESSION_ID])) { $this->sCode = $_SESSION[CAPTCHA_SESSION_ID]; } } function SetFlitePath($sFlitePath) { $this->sFlitePath = $sFlitePath; } function SetAudioPath($sAudioPath) { $this->sAudioPath = $sAudioPath; } function Mask($sText) { $iLength = strlen($sText); // loop through characters in code and format $sFormattedText = ''; for ($i = 0; $i < $iLength; $i++) { // comma separate all but first and last characters if ($i > 0 && $i < $iLength - 1) { $sFormattedText .= ', '; } elseif ($i == $iLength - 1) { // precede last character with "and" $sFormattedText .= ' and '; } $sFormattedText .= $sText[$i]; } $aPhrases = array( "The %1\$s characters are as follows: %2\$s", "%2\$s, are the %1\$s letters", "Here are the %1\$s characters: %2\$s", "%1\$s characters are: %2\$s", "%1\$s letters: %2\$s" ); $iPhrase = array_rand($aPhrases); return sprintf($aPhrases[$iPhrase], $iLength, $sFormattedText); } function Create() { $sText = $this->Mask($this->sCode); $sFile = md5($this->sCode.time()); // create file with flite shell_exec("$this->sFlitePath -t \"$sText\" -o $this->sAudioPath$sFile.wav"); // set headers header('Content-type: audio/x-wav'); header("Content-Disposition: attachment;filename=$sFile.wav"); // output to browser echo file_get_contents("$this->sAudioPath$sFile.wav"); // delete temporary file @unlink("$this->sAudioPath$sFile.wav"); } } // example sub class class PhpCaptchaColour extends PhpCaptcha { function PhpCaptchaColour($aFonts, $iWidth = CAPTCHA_WIDTH, $iHeight = CAPTCHA_HEIGHT) { // call parent constructor parent::PhpCaptcha($aFonts, $iWidth, $iHeight); // set options $this->UseColour(true); } } ?> Quote Link to comment https://forums.phpfreaks.com/topic/205087-image-captcha/#findComment-1074814 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.