Share 21 PHP function code Snippets (UP) (1) _php Tutorials

The following is an introduction to the PHPIn the development, often use of 21 function code snippets, when we use, it can be used directly.

1. PHP can read random strings

This code creates a readable string that is closer to the word in the dictionary, and is practical and has password validation capabilities.

 
 

  
  

  
/************** 
  
  

  
* @length –length of random string (must be a multiple of 2)
  
  

  
**************/  
  
  

  
function readable_random_string ($length  = 6) {
  
  

  
$conso = Array ("B", "C", "D", "F", "G", "H", "J", "K", "L" ,
  
  

  
"M", "N", "P", "R", "s", "T", "V", "w", "X", "Y", "z");
  
  

  
$vocal = Array ("A", "E", "I", "O", "U"); 
  
  

  
$password = ""; 
  
  

  
Srand (Double) microtime () *1000000);
  
  

  
$max  =  $length /2; 
  
  

  
 for ($i=1; $i <= $max ;  $i ++) 
  
  

  
{
  
  

  
$password .= $conso [Rand (0,19)]; 
  
  

  
$password .= $vocal [Rand (0,4)]; 
  
  

  
}
  
  

  
return   $password; 
  
  

  
}
 
 

2. PHP generates a random string

If you do not need a readable string, use this function instead to create a random string, as a random password for the user, and so on.

 
 

  
  

  
/************* 
  
  

  
*@l–length of random string
  
  

  
*/  
  
  

  
function Generate_rand ($l) {
  
  

  
$c = "Abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789″; 
  
  

  
Srand (Double) microtime () *1000000);
  
  

  
 for ($i=0; $i < $l ;  $i ++) { 
  
  

  
$rand .=  $c [rand ()%strlen($c)]; 
  
  

  
}
  
  

  
return   $rand; 
  
  

  
}
 
 

3. PHP encoded e-mail address

With this code, any e-mail address can be encoded as an HTML character entity to prevent it from being collected by the spam program.

 
 

  
  

  
function encode_email ($email= ' info@domain.com ',  $linkText= ' Contact Us ',
  
  

  
$attrs = ' class = "Emailencoder")
  
  

  
{
  
  

  
//Remplazar Aroba y puntos  
  
  

  
$email  =  Str_replace (' @ ', ' @ ',  $email); 
  
  

  
$email  =  Str_replace ('. ', '. ',  $email); 
  
  

  
$email  =  Str_split ($email, 5); 
  
  

  
$linkText  =  Str_replace (' @ ', ' @ ',  $linkText); 
  
  

  
$linkText  =  Str_replace ('. ', '. ',  $linkText); 
  
  

  
$linkText  =  Str_split ($linkText, 5); 
  
  

  
$part 1 = '
  
  

  
$part 2 = ' Ilto: '; 
  
  

  
$part 3 = ' "'. $attrs . ' > '; 
  
  

  
$part 4 = "; 
  
  

  
$encoded = "; 
  
  

  
return   $encoded; 
  
  

  
}
 
 

4. PHP Verification Email Address

e-mail validation is perhaps the most common form validation in Web pages, which, in addition to verifying e-mail addresses, also has the option of checking the MX records in the DNS that the mail domain belongs to, making the message verification feature more powerful.

 
 

  
  

  
function is_valid_email ($email,  $test _mx  = False)
  
  

  
{
  
  

  
if (eregi("^ ([_a-z0-9-]+) (. [ _a-z0-9-]+) *@ ([a-z0-9-]+) (. [ a-z0-9-]+) * (. [ a-z]{2,4}) $ ",  $email))
  
  

  
if ($test _mx)
  
  

  
{
  
  

  
list ($username,  $domain) = Split ("@",  $email ); 
  
  

  
return   getmxrr($domain,  $mxrecords); 
  
  

  
}
  
  

  
Else  
  
  

  
return true; 
  
  

  
Else  
  
  

  
return false; 
  
  

  
}
 
 

5. PHP Lists directory contents

 
 

  
  

  
function list_files ($dir)
  
  

  
{
  
  

  
if (is_dir($dir))
  
  

  
{
  
  

  
if ($handle  = Opendir ($dir))
  
  

  
{
  
  

  
 while (($file  = Readdir ($handle))!== false)
  
  

  
{
  
  

  
if ($file  ! = "." &&  $file ! = ":" &&  $file c14>! = "Thumbs.db")
  
  

  
{
  
  

  
Echo '$dir. $file . ' " > '. $file . '
’.” n ";
  
  

  
}
  
  

  
}
  
  

  
Closedir ($handle); 
  
  

  
}
  
  

  
}
  
  

  
}
 
 

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