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$str=array("10","9","8","7","6");
foreach ($str as $k =>$data){
if ($data=="8"){
echo $data."<br />";
}else{
echo $data."<br />";
}
}
<?php
$str=array("10","9","8","7","6");
if(array_search ("8",$str))
echo "8<br />";
foreach ($str as $k =>$data){
if ($data<>"8")
echo $data."<br />";
}
?>