foreachorref

<?php

// Initial Configuration
global $aHash;
$i   = 0;
$tmp = '';
while($i < 100) {
  $tmp .= 'a';
  ++$i;
}
$aHash = array_fill(-10, 30, $tmp);
unset($i, $tmp);

// Test Source
function Test2_3($aHash) {
     /* The Test */
    $t = microtime(true);
for ($k=0; $k < 1000; $k++) { 
    $key = array_keys($aHash);
    $size = sizeOf($key);
    for ($i=0; $i<$size; $i++) $aHash[$key[$i]] .= "a";
}
    return (microtime(true) - $t)*1000000;
}


// Test Source
function Test2_1($aHash) {
    /* The Test */
    $t = microtime(true);
    for ($i=0; $i < 1000; $i++) { 
        //  reset($aHash);
    foreach($aHash as $key=>$val) $aHash[$key] .= "a";
    }



    return (microtime(true) - $t)*1000000;
}

// Test Source
function Test2_2($aHash) {

    /* The Test */
    $t = microtime(true);
        for ($i=0; $i < 1000; $i++) { 
    //    reset($aHash);
    foreach($aHash as &$val) $val .= "a";
    }


    return (microtime(true) - $t)*1000000;
}


// Variable Clean-up
function Test2_End() {
    global $aHash;
    unset($aHash);
}


$t2=Test2_2($aHash);
$t1=Test2_1($aHash);
$t3=Test2_3($aHash);


echo "t1:",$t1,"\nt2:",$t2,"\nt3:",$t3;