php GD lib help

[adeelahmad]

i need help how can i generate multi color text image with php gd lib

 

like image.php?txt= Hello%20World

$txt=$_GET['txt'];

$txt=exploit(" ", $txt);

 

what to do next i want $txt[0] in black and $txt[1] in red with white background can any one help me???

[Barand]

$txt = 'Hello World';
echo "<img src='textimage.php?text=$txt'>";

 

where textimage.php is

<?php
$text = $_GET['text'];

$txt = explode(' ', $text);
/**
* calculate image size required
*/
$w = strlen($text) * imagefontwidth(5) + 40;
$h = imagefontheight(5);

$im = imagecreate($w, $h + 10);

/**
* define colours
*/
$bg = imagecolorallocate($im, 0xFF, 0xFF, 0xFF); // white
$bl = imagecolorallocate($im, 0x00, 0x00, 0x00); // black
$rd = imagecolorallocate($im, 0xFF, 0x00, 0x00); // red

/**
* place the text
*/
$x1 = 20;
$x2 = 20 + strlen($txt[0]) * imagefontwidth(5);
$y = 5;

imagestring($im, 5, $x1, $y, $txt[0], $bl);
imagestring($im, 5, $x2, $y, ' ' . $txt[1], $rd);

imagerectangle($im, 0, 0, $w-1, $h+9, $bl);    // border

/**
* output image
*/
header ("content-type: image/png");
imagepng($im);
imagedestroy($im);
?>

[adeelahmad]

its not working for me.

[chigley]

Any errors? Most probably because your server doesn't have GD installed. Go directly to textimage.php to see errors.

[adeelahmad]

hey thankx it works i am sorry i was passing wrong perameter but still one problem how ca i use a font file with this??

[Barand]

To get the width and height of the strings you have to get the bounding box coords as the text will be proportional and not fixed width

 

www.php.net/imagettfbbox

 

and to output the text use

 

www.php.net/imagettftext

[adeelahmad]

i still have problem if i have long string like Recommended Buys it over write second word on first please help me.

[Barand]

try

<?php
$text = $_GET['text'];

$txt = explode(' ', $text);

/**
* calculate image size required
*/
$font = 'C:/windows/fonts/tahoma.ttf';
$size = 18;

$bbox = imagettfbbox($size, 0, $font, $text);
$bbox2 = imagettfbbox($size, 0, $font, $txt[0]);

$w = $bbox[4] - $bbox[0] + 20;
$h = $bbox[1] - $bbox[5];

$im = imagecreate($w, $h + 10);

/**
* define colours
*/
$bg = imagecolorallocate($im, 0xFF, 0xFF, 0xFF); // white
$bl = imagecolorallocate($im, 0x00, 0x00, 0x00); // black
$rd = imagecolorallocate($im, 0xFF, 0x00, 0x00); // red


/**
* place the text
*/
$x1 = 10;
$x2 = 10 + $bbox2[4] - $bbox2[0];
$y = $h;

imagettftext($im, $size, 0, $x1, $y, $bl, $font, $txt[0]) ;
imagettftext($im, $size, 0, $x2, $y, $rd, $font, ' ' . $txt[1]) ;

imagerectangle($im, 0, 0, $w-1, $h+9, $bl);    // border

/**
* output image
*/
header ("content-type: image/png");
imagepng($im);
imagedestroy($im);
?>

[adeelahmad]

thankx for helping buts bold is there any option i can make this regular text?

[Barand]

it is regular text. Choose another font, maybe a light face.