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10 Useful Code Snippets For PHP Developers

1. Validate E-Mail

function is_valid_email($email)
{
 if(eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$",$email))
   return true;
 else
   return false;
}

2. Validate domain name

function is_valid_url($url)
{
if (preg_match('/^(http|https|ftp)://([A-Z0-9][A-Z0-9_-]*(?:.[A-Z0-9][A-Z0-9_-]*)+):?(d+)?/?/i', $url)) {
    echo "Your url is ok.";
else
    echo "Wrong url.";
}

3. Truncate String

This function takes a long string and shortens it to a defined length and adds appends an ellipsis (or custom string) to the end. Instead of chopping a word in half (if the limit finished within it), it moves the pointer up to the previous space.

function truncate($text, $limit = 25, $ending = '...')
{
 $text = strip_tags($text);
 if (strlen($text) > $limit) {
   $text = substr($text, 0, $limit);
   $text = substr($text, 0, -(strlen(strrchr($text, ' '))));
   $text = $text . $ending;
 }
 return $text;
}

4.Get Real IP Address

function getRealIPAddr()
{
 if (!empty($_SERVER['HTTP_CLIENT_IP'])){
    $ip=$_SERVER['HTTP_CLIENT_IP'];
 }
 elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
   $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
 }
 else{
   $ip=$_SERVER['REMOTE_ADDR'];
 }
 return $ip;
}

5. SEO and URL Friendly String

This function takes a string and makes it SEO and URL friendly.

function seo($string){
  $string = preg_replace("`\[.*\]`U","",$string);
  $string = preg_replace('`&(amp;)?#?[a-z0-9]+;`i','-',$string);
  $string = preg_replace( "`&([a-z])(acute|uml|circ|grave|ring|cedil|slash|tilde|caron|lig|quot|rsquo);`i","\\1", $string );
  $string = preg_replace( array("`[^a-z0-9]`i","`[-]+`") , "-", $string);
  $string = htmlentities($string, ENT_COMPAT, 'utf-8');return strtolower(trim($string, '-'));
}

6. Send Simple Mail

function send_simple_mail($from,$to,$subject,$body)
{
  $headers = "From: $from\r\n";
  $headers .= "Reply-To: $from\r\n";
  headers .= "Return-Path: $from\r\n";
  $headers .= "X-Mailer: PHP5\n";
  $headers .= 'MIME-Version: 1.0' . "\n";
  $headers .= 'Content-type: text/html; charset=utf-8' . "\r\n";
  @mail($to,$subject,$body,$headers);
}

7.Directory Listing

function list_files($dir)
{
  if(is_dir($dir)){
    if($handle = opendir($dir)){
      while(($file = readdir($handle)) !== false){
        if($file != "." && $file != ".." && $file != "Thumbs.db"{
          echo '<a target="_blank" href="'.$dir.$file.'">'.$file.'</a><br/>'."\n";
        }
      }
      closedir($handle);
    }
  }
}

8. Generate a Random String

This snippet creates and returns a random string. It can be used for random string creation.

function get_random_string(){
  $string = "abcdefghijklmnopqrstuvwxyz0123456789";
  for($i=0;$i<25;$i++){
    $pos = rand(0,36);
    $str .= $string[$pos];
  }
  return $str
}

9. Send Files Via FTP

$connection = ftp_connect($server);
$login = ftp_login($connection, $ftp_user_name, $ftp_user_pass);
if (!$connection || !$login) { die('Connection attempt failed!'); }
$upload = ftp_put($connection, $dest, $source, $mode);
if (!$upload) { echo 'FTP upload failed!'; }
ftp_close($connection);

10. Find title Tag and Get Value

This code snippet will find and print the text within the title tag of a html page.

function get_title_value(){
  $fp = fopen("http://www.example.com","r");
  while (!feof($fp) ){
    $page .= fgets($fp, 4096);
  }
  $titre = eregi("<title>(.*)</title>",$page,$regs);
  echo $regs[1];
  fclose($fp);
}

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Category PHP, Last Modified: 08 Ekim 2009 Author: emincan | Giriş