(PHP 4, PHP 5)
strlen — Get string length
$string
   )
   Returns the length of the given string. 
  
   The length of the string on success, 
   and 0 if the string is empty.
  
| Version | Description | 
|---|---|
| 5.3.0 | Prior versions treated arrays as the string Array, thus returning
       a string length of 5 and emitting an E_NOTICElevel error. | 
Example #1 A strlen() example
<?php
$str = 'abcdef';
echo strlen($str); // 6
$str = ' ab cd ';
echo strlen($str); // 7
?>
Note:
strlen() returns the number of bytes rather than the number of characters in a string.
Note:
strlen() returns
NULLwhen executed on arrays, and anE_WARNINGlevel error is emitted.