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PHParadise > string handling > string in string

some functions to find strings inside other strings.

copy the code of string handling / string in string

<?php

/*------------------------------------------------------------------------------
|
|                             PHParadise source code
|
|-------------------------------------------------------------------------------
|
| file:             string in string
| category:         string handling
|
| last modified:    Fri, 01 Jul 2005 23:44:17 GMT
| downloaded:       Sat, 11 Feb 2012 11:09:30 GMT as copy from textarea
|
| code URL:
| http://phparadise.de/php-code/string-handling/string-in-string/
|
| description:
| some functions to find strings inside other strings.
|
------------------------------------------------------------------------------*/

// InStr function
// checks for an occurance of a string
// within another string
function InStr($String,$Find,$CaseSensitive = false)
{
	$i=0;
	while(strlen($String) >= $i)
	{
		unset($substring);
		if($CaseSensitive)
		{
			$Find = strtolower($Find);
			$String = strtolower($String);
		}
		$substring = substr($String,$i,strlen($Find));
		if($substring == $Find) return true;
		$i++;
	}
	return false;
}

// A similar function, returns the number of occurances
function InStrCount($String,$Find,$CaseSensitive = false)
{
	$i = 0;
	$x = 0;
	while(strlen($String) >= $i)
	{
		unset($substring);
		if($CaseSensitive)
		{
			$Find = strtolower($Find);
			$String = strtolower($String);
		}
		$substring = substr($String,$i,strlen($Find));
		if($substring == $Find) $x++;
		$i++;
	}
	return $x;
}

// Another similar function, this will return the position of
// the string. returns -1 if the string does not exist
function InStrPos($String,$Find,$CaseSensitive = false)
{
	$i = 0;
	while(strlen($String) >= $i)
	{
		unset($substring);
		if($CaseSensitive)
		{
			$Find = strtolower($Find);
			$String = strtolower($String);
		}
		$substring = substr($String,$i,strlen($Find));
		if($substring == $Find) return $i;
		$i++;
	}
	return -1;
}

PHParadise source code of “string in string” in category “string handling”

PHParadise > string handling > string in string

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