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strspn

Find length of initial segment matching mask (PHP 4, PHP 5)
int strspn ( string str1, string str2 [, int start [, int length]] )

Finds the length of the initial segment matching mask.

The line of code:

<?php
$var
= strspn("42 is the answer, what is the question ...", "1234567890");
?>

will assign 2 to $var, because the string "42" will be the longest segment containing characters from "1234567890".

Parameters

str1

The first string.

str2

The second string.

start

The start position of the string to examine.

length

The length of the string to examine.

Return Values

Returns the length of the initial segment of str1 which consists entirely of characters in str2.

ChangeLog

VersionDescription
4.3.0 The start and length parameters were added

Examples

Example 2465. strspn() example

<?php
echo strspn("foo", "o", 1, 2); // 2
?>


Notes

Note:

This function is binary-safe.

See Also
strcspn()