PYTHON strspn

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Python replacement for PHP's strspn [ edit | history ]
import re
def strspn(str1, str2, start=0, length=None):
    if not length: length = len(str1)
    return len(re.search('^[' + str2 + ']*', str1[start:start + length]).group(0))

PHP strspn

PHP original manual for strspn [ show | php.net ]

strspn

(PHP 4, PHP 5)

strspnFind length of initial segment matching mask

Description

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. 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 .

Changelog

Version Description
4.3.0 The start and length parameters were added

Examples

Example #1 strspn() example

<?php
echo strspn("foo""o"12); // 2
?>

Notes

Note: This function is binary-safe.

See Also

  • strcspn() - Find length of initial segment not matching mask