<?php
$a = array();
for($i=0;$i<10000;$i++){
$a[] = "test script ";
}
$start = microtime(1);
foreach($a as $c => $v){
$a[$c] = trim($v);
}
$end = microtime(1);
echo ($end - $start)."s\n";
$a = array();
for($i=0;$i<10000;$i++){
$a[] = "test script ";
}
$start = microtime(1);
$arr = array_map('trim',$a);
$end = microtime(1);
echo ($end - $start)."s\n";