strspn
(PHP 4, PHP 5)
strspn — Find length of initial segment matching mask
Description
int strspn
( string $str1
, string $str2
[, int $start
[, int $length
]] )
The line of code:
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.
Negative value counts position from the end of a string.
-
length
-
The length of the string to examine.
Negative value sets length from the end of a string.
Return Values
Returns the length of the initial segment of str1
which consists entirely of characters in str2
.
Examples
Example #1 strspn() example
<?php
echo strspn("foo", "o", 1, 2); // 2
?>
Notes
Note: This function is
binary-safe.
