strcspn

Definition and usage

strcspn() function returns the number of characters (including spaces) that are found on the string before any specified character is found.

Tip: Please use the strspn() function to return the number of characters in the string containing the specified character list.

Note: This function is binary safe.

Example

Example 1

Output the number of characters found before the character "w" is found in the string "Hello world!":

 <?php
echo strcspn ( "Hello world!" , "w" ) ;
?>

Try it yourself

Example 2

Use all parameters to output the number of characters that were found before the character "w" is found in the string "Hello world!":

 <?php
echo strcspn ( "Hello world!" , "w" , 0 , 6 ) ; // The start position is 0, and the length of the search string is 6.
?>

Try it yourself

grammar

 strcspn ( string , char , start , length )