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(PHP 4, PHP 5)
strspn — Find length of initial segment matching mask
Description
int strspn ( string $str1, string $str2 [, int $start [, int $length]] )
Returns the length of the initial segment of str1 which consists entirely of characters in str2.
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".
As of PHP 4.3.0, strspn() accepts two optional integer parameters that can be used to define the start position and the length of the string to examine.
<?php
echo strspn("foo", "o", 1, 2); // 2
?>
Note: This function is binary-safe.
Doing for this function is string
Add by Pancho
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