PHP: strspn() function


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


(PHP 4 and above)


strspn(main_string, search_string, start_position, length) 


Name Description Required /
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



echo strspn($string1, 'W3Res');



View the example in the browser

See also

PHP Function Reference

Previous: strrpos
Next: strstr

PHP: Tips of the Day

PHP: How to write to the console in PHP?


On Firefox you can use an extension called FirePHP which enables the logging and dumping of information from your PHP applications to the console. This is an addon to the awesome web development extension Firebug.

  • http://www.studytrails.com/blog/using-firephp-in-firefox-to-debug-php/


However if you are using Chrome there is a PHP debugging tool called Chrome Logger or webug (webug has problems with the order of logs).

More recently Clockwork is in active development which extends the Developer Tools by adding a new panel to provide useful debugging and profiling information. It provides out of the box support for Laravel 4 and Slim 2 and support can be added via its extensible API.

Using Xdebug

A better way to debug your PHP would be via Xdebug. Most browsers provide helper extensions to help you pass the required cookie/query string to initialize the debugging process.

  • Chrome - Xdebug Helper
  • Firefox - The easiest Xdebug
  • Opera - Xdebug
  • Safari - Xdebug Toggler

Ref : https://bit.ly/3ck9rFg