Ersin Acar

Here is the list of 43 short tips you can use for writing an optimized and more efficient PHP code: 1. If a method can be static, declare it static. Speed improvement is by a factor of 4. 2. echo is faster than print. 3. Use echo’s multiple parameters instead of string concatenation. 4. Set [...]

I’m working on a security and trying to make searches in a multi-dimensional array Here is the function; <?php function multi_array_search($needle, $haystack, $key, &$result, $searchlevel = 0) { while(is_array($haystack) && isset($haystack[key($haystack)])) { if($searchlevel == 0 && key($haystack) == $key && $haystack[$key] == $needle) { $result = $haystack; } elseif($searchlevel > 0) { multi_array_search($needle, $haystack[key($haystack)], $key, [...]

I just found a way to using wilcard with unlink in PHP. Here is the scenario; files might be: 120a-some_file1.jpg 210w-some_file1.jpg some_file123.jpg 480h-some_file1.jpg somefile.doc if you want to delete; 120a-some_file1.jpg 200w-some_file1.jpg 480h-some_file1.jpg you can use this code; <?php foreach( glob(’*-some_file1.jpg’) as $file ){ unlink($file); } ?>

ClickHeat is a visual heatmap of clicks on a HTML page, showing hot and cold click zones. Requirements – on the browser’s client: Javascript (tested on Firefox 2.0, Internet Explorer 6 and 7, Konqueror…) – on the server: either Linux or Windows (since ClickHeat 1.3 release), Apache or Lighttpd (other may work fine), PHP, the [...]

The failing in using the value of $_SERVER['REMOTE_ADDR'] is that if the visitor is using a proxy then you will get the proxy IP address and not the visitors real IP address. This function works by going through any variables in the $_SERVER array that might exist that would contain information to do with IP [...]

It is sometimes a good idea to find out where users can come from. When PHP is run the $_SERVER superglobal is always available and if the user has clicked on a link and landed on your page then the HTTP_REFERER value will be set. You can retrieve it like this. if ( isset($_SERVER[ HTTP_REFERER [...]

This simple code example uses a combination of strrchr to find the last occurrence of a string and substr to return part of the string in order to find the file extension for a given filename. This is ideal if you want to quickly find a file extension. $ext = substr(strrchr($fileName, ‘.’), 1); This code [...]

There are three available cryptographic functions in PHP, these are md5(), sha1() and crc32(). All of the functions take a string and output a value that is encrypted and can’t be reversed to the original string. In fact the only way to get the original string back is to run a brute force algorithm which [...]

1 2 3 4 5 6 7 8 9 10 11 function ShortText($text) { // display char lenght $chars = 10; $text = $text." "; $text = substr($text,0,$chars); $text = substr($text,0,strrpos($text,’ ‘)); $text = $text."…"; // You can give a link here return $text; } //usage; echo ShortText("it’s a very very very very very very [...]

Hi! i made this function at 2006 but still using it’s very usefull! image.php; 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 <?php function createimg () { session_start(); ini_set("session.gc_maxlifetime","36000"); $fontnum=6; //count of fonts $numbers = strtoupper(substr(rand(0,999999999999),-3)); $_SESSION["guv"] = $numbers; [...]