Php time a script

//place this before any script you want to calculate time
$time_start = microtime(true); 

//sample script
for($i=0; $i<1000; $i++){
 //do anything
}

$time_end = microtime(true);
$execution_time = ($time_end - $time_start);
echo '<b>Total Execution Time:</b> '.($execution_time*1000).'Milliseconds';

Source: stackoverflow.com

Php time how long a function takes

<?php
$startTime = microtime(true);

/*stuff is going on*/

echo "Elapsed time is: ". (microtime(true) - $startTime) ." seconds";

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