- var_dump: documentation ( source)
- strstr: documentation ( source)
<?php
$strselvaluelist = '4';
$i=0;
if(!empty($strselvaluelist)){
while($i < strlen($strselvaluelist)){
if($strselvaluelist[$i] == 4){
echo 1;
if(!strstr(17, $strselvaluelist)){
echo'2';
$strselvaluelist.='|17';
}
}
$i++;
}
}
var_dump($strselvaluelist);