Goldeneye
-
Posts
315 -
Joined
-
Last visited
Never
Goldeneye's Achievements
Regular Member (3/5)
0
Reputation
-
The weirdest thing is happening. I'm using this function someone else made getCaretPosition which retrieves the position of the cursor in a textarea. I only use this function for IE. The problem is that the getCaretPosition function seems to return the length of the textarea-value. So if you have the text "abcd" in the textarea (with the cursor between the 'b' and 'c') and press the link, the result will be "ab%%%%%%cd" with the cursor set after the first 4 characters (in this case "ab%%"). The way I have the javascript set up right now, the cursor should not move. Am I missing something? <html> <head> <script type="text/javascript"> function insert_formatText(pre, suf, fid, eid){ if(document.selection){ //Internet Explorer var str = document.selection.createRange().text; document.forms[fid].elements[eid].focus(); var sel = document.selection.createRange(); var caretPos = getCaretPosition(document.forms[fid].elements[eid]); sel.text = pre + str + suf; setCaretPosition(document.forms[fid].elements[eid], caretPos); return; } else if ((typeof document.forms[fid].elements[eid].selectionStart) != 'undefined'){ //Firefox var txtarea = document.forms[fid].elements[eid]; var selLength = txtarea.textLength; var selStart = txtarea.selectionStart; var selEnd = txtarea.selectionEnd; var oldScrollTop = txtarea.scrollTop; var s1 = (txtarea.value).substring(0, selStart); var s2 = (txtarea.value).substring(selStart, selEnd) var s3 = (txtarea.value).substring(selEnd, selLength); txtarea.value = s1 + pre + s2 + suf + s3; //set the cursor in-between the pre and suf parameters var pos = (s1.length + pre.length); txtarea.focus(); txtarea.setSelectionRange(pos, pos); txtarea.scrollTop = oldScrollTop; return; } else document.forms[fid].elements[eid].value += pre + suf; } function setCaretPosition(ctrl, pos){ if(ctrl.setSelectionRange){ ctrl.focus(); ctrl.setSelectionRange(pos,pos); } else if (ctrl.createTextRange) { var range = ctrl.createTextRange(); range.collapse(true); range.moveEnd('character', pos); range.moveStart('character', pos); range.select(); } } function getCaretPosition(ctrl){ var CaretPos = 0; if(document.selection){ // IE Support ctrl.focus (); var Sel = document.selection.createRange (); Sel.moveStart ('character', -ctrl.value.length); CaretPos = Sel.text.length; } else if (ctrl.selectionStart || ctrl.selectionStart == '0') // Firefox support CaretPos = ctrl.selectionStart; return (CaretPos); } </script> </head> <body> <form id="entryform"> <a href="javascript:void(0);" onclick="insert_formatText('%%%', '%%%', 'entryform', 'text');">Bold</a><br /> <textarea id="text"></textarea> </form> </body> </html>
-
Making the & and | bitwise operators work higher than 2^31
Goldeneye replied to Goldeneye's topic in PHP Coding Help
The Math part makes sense to me. But accomplishing it, I can't get my head around. You mean by concatenation? The only reason it doesn't make complete sense is because I am unfamiliar with the pack and unpack functions. Would this be considered as using a bitmask? Or is a bitmask something completely different? -
Making the & and | bitwise operators work higher than 2^31
Goldeneye replied to Goldeneye's topic in PHP Coding Help
How would I accomplish that? :-\ Well, it's not that I'm explicitly storing checkboxes this way. This is what I implemented for my user-permission system and categorization system. -
<?php $abbr_state = mysql_real_escape_string($_POST['abbr_state']); $query=mysql_query("SELECT full_state FROM zip_codes WHERE abbr_state = '".$abbr_state."'") or die("Could not get data from db: ".mysql_error()); $full_state=$result['full_state']; ?> Try that
-
Here is a simple script which uses bitwise operations to determine whether or not a checkbox has been set. The problem is that if you use the $alpha array, the script doesn't produce the results you should expect. For example, if you set the last checkbox while using the $alpha array, all the checkboxes become set. I partially know why this happens as the PHP-Manual enlightened me: I attempted to use the GMP_* functions but because those aren't part of the PHP-Standard-Library, I do not wish to rely on them. Is there any way to make these functions work for integers beyond 2^31? Here is a standalone script I'm using to make these tests. $alpha = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'); $delta = range('a', 'z'); function generate($array){ $n = count($array); $c = array(); for($i = 0; $i < $n; ++$i){ $c[bcpow(2, $i)] = $array[$i]; } return $c; } function set($array, $post){ $c = 0; foreach($array as $key => $val) if(isset($post['c'.$key])) $c |= $key; return $c; } function check($num, $category){ if($num & $category) return 'CHECKED'; return ''; } function checkboxes($array, $numval=0){ $i = 0; $form = ''; foreach($array as $key => $val){ $checked = check($numval, $key); $form .= '<input type="checkbox" '.$checked.' name="c'.$key.'" id="c'.$key.'">' . '<label for="c'.$key.'"> '.$val.'</label><br />'; ++$i; } return $form; } $array = generate($alpha); $num = 0; if(isset($_POST['action'])){ $num = set($array, $_POST); echo $num; } echo '<form action="y.php" method="post" style="width: 400px; border: 1px solid black;">'; echo checkboxes($array, $num); echo '<input type="submit" name="action" value="Set" />'; echo '</form>';
-
A fairly simple way would be to use the $_SESSION array. This would ensure that each user would not see a page generated by another user which is useful if have a User-account system. $_SESSION['cache'] = array( 'PAGE_NAME' => array( 'html' => 'HTML_HERE', 'time' => 'UNIX_TIMESTAMP' ) ); 'PAGE_NAME' is just the name of the page the cache is for. So say you had three pages (index.php, about.php, contact.php); each page would have its own element in the $_SESSION['cache'] array: $_SESSION['cache']['index.php']; $_SESSION['cache']['about.php'] $_SESSION['cache']['contact.php'] $_SESSION['cache']['PAGE_NAME']['time'] would contain the timestamp (from time()) of when the page is generated. This way, you can check on each page load if the cached content is more than X seconds, minutes, or hours old and if it is, then regenerate the HTML.
-
Ways to use a class within a different class
Goldeneye replied to Goldeneye's topic in PHP Coding Help
Aggregation is a new one to me. I only knew about composition and inheritance but I also knew using $GLOBALS is a poor programming practice as it can easily lead to overwritten data. I read up about using a Registry (a registry pattern) to store Objects in but that seems counter-productive and abusive to the Registry Pattern. -
I do know how to do this but I am curious about whether or not there is a "preferred" way to do this. I know there are a couple ways to use a class (I'll call Alpha_Class) within another class (I'll class Beta_Class) Let's say we have this simple class (Beta_Class): class beta { function foo(){ } } If I wanted to use the Alpha Class within the Beta Class, I could any number of things. For example: class beta { function foo(){ $this->alpha = new alpha; //$this->alpha->bar(); } } Or you could simply use the $GLOBALS array to store instantiated objects in: $GLOBALS['alpha'] = new alpha; class beta { function foo(){ //GLOBALS['alpha']->bar(); } } You could even declare Alpha_Class as a static class and thus would not need to be instantiated: static class alpha { static function bar(){} } class beta { function foo(){ //alpha::bar(); } } Those are the only ways I can think of right now. Are there any other ways to accomplish this? I was wondering which way is the best in terms of readability and maintainability.
-
Redirecting "http://*.foo.bar/" to "http://foo.bar/*"
Goldeneye posted a topic in Apache HTTP Server
Trying to set up my wild-card domain so that it will dynamically redirect to a folder. EX) http://x.foo.bar/ redirects to http://foo.bar/x/ Is there anyway to do this with Wild-Card Domains? Or... is it even possible? I tried this but this (but to no avail): <VirtualHost *:80> ServerName foo.bar ServerAlias foo.bar DocumentRoot /home/foo/bar/foo.bar_public ErrorLog /home/foo/bar/foo.bar_private/error_log CustomLog /home/foo/bar/foo.bar_private/access_log combined RedirectMatch * http://foo.bar/$1 </VirtualHost> -
session_is_registered is not a native PHP-function; that's most likely where the problem lies. Also, if myusername is supposed to be a variable, make sure you prepend a dollar-sign to it so it becomes: $myusername
-
Trying to improve my script-architecture, I got curious about other ways to pass application-data around aside from using the$GLOBALS array. The only other way I really found was to use an object called a "Registry". I just ended up being confused regarding when which method is better than the other, let alone how to even use a registry-object in my scripts. So my questions are: - When is it better to use a registry object in place of global data? - how would you use a registry? - how would a registry object get passed around, through other objects and functions? Heres the registry I found... class registry { var $_cache_stack = array(); function __construct(){ $this->_cache_stack = array(array()); } function set($key, &$item){ $this->_cache_stack[0][$key] = &$item; } function &get($key){ return $this->_cache_stack[0][$key]; } function isEntry($key){ return ($this->getEntry($key) !== null); } function &instance(){ static $registry = false; if (!$registry) $registry = new Registry(); return $registry; } function save(){ array_unshift($this->_cache_stack, array()); if (!count($this->_cache_stack)) exit('Registry lost!'); } function restore(){ array_shift($this->_cache_stack); } }
-
can someone help me get this code working please?
Goldeneye replied to jamesyrawr's topic in PHP Coding Help
$prod $_GET['id']; should be... $prod = $_GET['id']; -
You can't parse [X]HTML with regex. Because HTML can't be parsed by regex. Regex is not a tool that can be used to correctly parse HTML. As I have answered in HTML-and-regex questions here so many times before, the use of regex will not allow you to consume HTML. Regular expressions are a tool that is insufficiently sophisticated to understand the constructs employed by HTML. HTML is not a regular language and hence cannot be parsed by regular expressions. Regex queries are not equipped to break down HTML into its meaningful parts. so many times but it is not getting to me. Even enhanced irregular regular expressions as used by Perl are not up to the task of parsing HTML. You will never make me crack. HTML is a language of sufficient complexity that it cannot be parsed by regular expressions. Even Jon Skeet cannot parse HTML using regular expressions. Every time you attempt to parse HTML with regular expressions, the unholy child weeps the blood of virgins, and Russian hackers pwn your webapp. Parsing HTML with regex summons tainted souls into the realm of the living. HTML and regex go together like love, marriage, and ritual infanticide. The <center> cannot hold it is too late. The force of regex and HTML together in the same conceptual space will destroy your mind like so much watery putty. If you parse HTML with regex you are giving in to Them and their blasphemous ways which doom us all to inhuman toil for the One whose Name cannot be expressed in the Basic Multilingual Plane, he comes. HTML-plus-regexp will liquify the nerves of the sentient whilst you observe, your psyche withering in the onslaught of horror. Rege̿̔̉x-based HTML parsers are the cancer that is killing StackOverflow it is too late it is too late we cannot be saved the trangession of a chi͡ld ensures regex will consume all living tissue (except for HTML which it cannot, as previously prophesied) dear lord help us how can anyone survive this scourge using regex to parse HTML has doomed humanity to an eternity of dread torture and security holes using regex as a tool to process HTML establishes a breach between this world and the dread realm of c͒ͪo͛ͫrrupt entities (like SGML entities, but more corrupt) a mere glimpse of the world of regex parsers for HTML will instantly transport a programmer's consciousness into a world of ceaseless screaming, he comes, the pestilent slithy regex-infection will devour your HTML parser, application and existence for all time like Visual Basic only worse he comes he comes do not fight he com̡e̶s, ̕h̵is un̨ho͞ly radiańcé destro҉ying all enli̍̈́̂̈́ghtenment, HTML tags lea͠ki̧n͘g fr̶ǫm ̡yo͟ur eye͢s̸ ̛l̕ik͏e liquid pain, the song of re̸gular expression parsing will extinguish the voices of mortal man from the sphere I can see it can you see ̲͚̖͔̙î̩́t̲͎̩̱͔́̋̀ it is beautiful the final snuffing of the lies of Man ALL IS LOŚ͖̩͇̗̪̏̈́T ALL IS LOST the pon̷y he comes he c̶̮omes he comes the ichor permeates all MY FACE MY FACE ᵒh god no NO NOO̼OO NΘ stop the an*̶͑̾̾̅ͫ͏̙̤g͇̫͛͆̾ͫ̑͆l͖͉̗̩̳̟̍ͫͥͨe̠̅s ͎a̧͈͖r̽̾̈́͒͑e not rè̑ͧ̌aͨl̘̝̙̃ͤ͂̾̆ ZA̡͊͠͝LGΌ ISͮ̂҉̯͈͕̹̘̱ TO͇̹̺ͅƝ̴ȳ̳ TH̘Ë͖́̉ ͠P̯͍̭O̚N̐Y̡ H̸̡̪̯ͨ͊̽̅̾̎Ȩ̬̩̾͛ͪ̈́̀́͘ ̶̧̨̱̹̭̯ͧ̾ͬC̷̙̲̝͖ͭ̏ͥͮ͟Oͮ͏̮̪̝͍M̲̖͊̒ͪͩͬ̚̚͜Ȇ̴̟̟͙̞ͩ͌͝S̨̥̫͎̭ͯ̿̔̀ͅ [as cited from http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454]
-
Well, you seem to be missing a set of braces around your "if()..." statement, you're also missing quotes around Admin (in your if statement). You should use the isset function to check if a variable isset. Finally, your code structure can be consolidated/augmented. Try this: session_start(); if (isset($_SESSION['username'])){ if ($_SESSION['username'] != 'Admin') echo "Welcome, ".$_SESSION['username']. "!<br /><a href='settings.php'>Settings</a><br /><a href='logout.php'>Logout</a>"; else echo "Welcome, ".$_SESSION['username']. "!<br /><a href='logout.php'>Logout</a><br /><a href='admin/index.php'>Admin Area</a>"; } else die("You must be logged in!");
-
What exactly do you want this regular expression to do? You want it to match alphabetic-characters at the beginning of a string? If so, it appears to be working fine for me: <?php $input='hjkhk$#@$@'; preg_match_all("/^[A-Za-z]{1,20}/",$input,$match); print_r($match); ?> produces: Array ( [0] => Array ( [0] => hjkhk ) )