strspn

int strspn(string string, string mask)

Finds the length of the initial substring containing only characters from mask.

Returns:

Number of characters found

Description:

strspn() returns the length of the substring at the start of string that contains only characters from mask . Given string abcdef and mask abc, for example, the function returns 3.

Version:

PHP 3.0.3+, PHP 4+

See also:

To return the number of characters present in a string before any of a set of specified characters is found:

strcspn()

Example:

Display names that start with vowels
<?php 
$list = array ("Andrew", "Brigitte", "Chris", "Deb"); 
foreach ($list as $name) {
   if (strspn ($name, 'aeiouyAEIOUY')) {
      echo $name, "\n"; 
   } 
} 
?> 

Output: 
Andrew

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