note 37850 added to functions.returning-values
| From: | renatojaz at hotmail dot com | Date: | Sat, 29 Nov 2003 19:24:01 +0000 |
| Subject: | note 37850 added to functions.returning-values | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-61147@lists.php.net to get a copy of this message | ||
I need what does this code, and what return me; thanks:
<?php
function InStr($s1, $s2)
{
if(!(is_string($s1) && is_string($s2))) return 0;
$s1len = strlen($s1);
$s2len = strlen($s2);
if(!ereg($s1, $s2)) return 0;
if($s1 == $s2) return 1;
$begin = 0;
$end = $s2len - $s1len;
$position = 0;
while($end > $begin + 1)
{
$middle = ceil(($begin + $end) / 2);
$leftBegin = $begin;
$rightBegin = $middle + $s1len;
$leftEnd = $middle;
$rightEnd = $end + $s1len;
//Check left first
if(ereg($s1, substr($s2, $leftBegin, $rightBegin - $leftBegin)))
{
$end = $middle;
}
else //(ereg($s1, substr($s2, $leftEnd, $rightEnd - $leftEnd)))
{
$position += $middle - $begin;
$begin = $middle;
}
}
if(ereg($s1, substr($s2, $end, $s1len))) $position++;
return $position + 1;
}
----
Manual Page -- http://www.php.net/manual/en/functions.returning-values.php
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