note 64154 deleted from function.substr by nlopess
| From: | nlopess@php.net | Date: | Sat, 08 Apr 2006 22:03:27 +0000 |
| Subject: | note 64154 deleted from function.substr by nlopess | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-107572@lists.php.net to get a copy of this message | ||
Note Submitter: g8z at yahoo dot com
----
<?php
/**
* Gets the common substring from all values of $arr, starting from $offset
* Courtesy of the $5 Script Archive: http://www.tufat.com
*/
function findcommon( $arr, $offset = 0 ) {
$common = FALSE;
$mlen = strlen($arr[0]);
foreach($arr as $str) {
if ( $mlen > strlen( $str ) ) {
$mlen = strlen($str);
}
}
for( $p = $offset + 1; $p < $mlen; $p++ )
{
$compare = substr( $arr[0], $offset, $p - $offset );
$match = TRUE;
foreach( $arr as $str ) {
if ( substr( $str, $offset, $p - $offset ) != $compare ) {
$match = FALSE;
}
}
if ( $match ) {
$common = $compare;
}
}
return $common;
}
$codes = array(
'ABC 123',
'ABC 124',
'ABC 145',
);
echo findcommon( $codes ); // result: "ABC 1"
$codes2 = array(
'ABC 1',
'ABC 123',
'ABC 456',
);
echo findcommon( $codes2 ); // result: "ABC "
$codes3 = array(
'ABC 123',
'ABC 124',
);
echo findcommon( $codes3, 1 ); // result: "BC 12"
$codes4 = array(
'ABC 123',
'AB3 ABC',
);
echo findcommon( $codes4, 2 ); // result: false
?>