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PHP: strspn() function

PHP: Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask

The strspn() function is used to find the length of the initial segment of a string which matches characters from a second string.

Version:

(PHP 4 and above)

Syntax:

strspn(main_string, search_string, start_position, length)

Parameters:

Name Description Required /
Optional		 Type
main_string The first string. Required String
search_string The searched string. Required String
start_position Sets the starting position of the first string. Negative value counts position from the end of main_string. Optional Integer
length Sets the no. of characters to be checked in the main_string. Optional Integer

Return value:

Returns the length of the initial segment of main_string.

Value Type: Integer

Pictorial Presentation

string_strspn

Example: 

<?php
$string1='W3RESOURCE';
echo strspn($string1, 'W3Res');
?>

Output: 

3

View the example in the browser

See also

PHP Function Reference

Previous: strrpos
Next: strstr



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https://www.w3resource.com/php/function-reference/strspn.php