note 43503 added to function.is-callable
| From: | bob at thethirdshift dot net | Date: | Wed, 23 Jun 2004 13:51:26 +0000 |
| Subject: | note 43503 added to function.is-callable | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-71549@lists.php.net to get a copy of this message | ||
I, too, was wondering whether is_callable or function exists is faster when checking class methods.
So I setup a test:
<?php
function doTimes($start, $end)
{
$start_time = explode (" ", $start);
$start_time = $start_time[1] + $start_time[0];
$end_time = explode (" ", $end);
$end_time = $end_time[1] + $end_time[0];
$time = $end_time - $start_time;
return $time;
}
class test
{
function test()
{
return true;
}
}
$callableIsTrue = false;
$startIsCallable = microtime();
for($i = 0; $i < 10000; $i++)
{
if(is_callable(array('test', 'test'))) { $callableIsTrue = true; }
}
$endIsCallable = microtime();
$existsIsTrue = false;
$startExists = microtime();
for($i = 0; $i < 10000; $i++)
{
if(function_exists('test::test')) { $existsIsTrue = true; }
}
$endExists = microtime();
$timeIsCallable = doTimes($startIsCallable, $endIsCallable);
$timeExists = doTimes($startExists, $endExists);
echo "<b>is_callable = ".($callableIsTrue ? "TRUE" :
"FALSE")."</b>, \n";
echo "<b>function_exists = ".($existsIsTrue ? "TRUE" :
"FALSE")."</b><br>\n";
echo "<br>Did 10000 is_callables in ".$timeIsCallable." seconds";
echo "<br>Did 10000 function_exists in ".$timeExists." seconds";
?>
This gives the output:
is_callable = TRUE, function_exists = FALSE
Did 10000 is_callables in 0.0640790462494 seconds
Did 10000 function_exists in 0.0304429531097 seconds
So the fact that function_exists is twice as fast is slightly over shadowed by the fact that it
doesn't work on class methods.
----
Manual Page -- http://www.php.net/manual/en/function.is-callable.php
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