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PHP: strcspn() function

Description

The strcspn() function is used to get the number of characters that occur between the start of the main string and the first occurrence of any character listed in the second string.

Version:

(PHP 4 and above)

Syntax:

strcspn(main_string, second_string, start_position, string_length)

Parameters:

Name Description Required /
Optional
Type
main_string The initial string. Required String
second_string The second string whose characters will be checked. Required String
start_position Starting position of the string to examine. Optional Integer
string_length Length of the string to examine. Optional Integer

Return value:

The length of the segment.

Value Type: Integer.

Pictorial Presentation

php-string-strcspn()

Example:

<?php
echo strcspn('W3resource.com', '.');
?>

Output:

10

View the example in the browser

See also

PHP Function Reference

Previous: strcoll
Next: strip_tags



PHP: Tips of the Day

PHP: Using str_replace so that it only acts on the first match?

Can be done with preg_replace:

function str_replace_first($from, $to, $content)
{
    $from = '/'.preg_quote($from, '/').'/';

    return preg_replace($from, $to, $content, 1);
}

echo str_replace_first('abc', '123', 'abcdef abcdef abcdef'); 
// outputs '123def abcdef abcdef'

The magic is in the optional fourth parameter [Limit]. From the documentation:

[Limit] - The maximum possible replacements for each pattern in each subject string. Defaults to -1 (no limit).

Ref : https://bit.ly/35SCuP8