PHP Interpreter load

A few questions for people who understand the PHP interpreter well.

  • Does the number of opening descriptors affect the script execution speed? I.e., the file contains a mixture of HTML markup and PHP code, and will it significantly affect performance if we open and close <? ?> on each line?

This:

<?
if( $val > 0 ) {
    echo 'yes';
}
else {
    echo 'no';
}
?>

Or

<? if( $val > 0 ) { ?>
    <? echo 'yes'; ?>
<? } ?>
<? else { ?>
    <? echo 'no'; ?>
<? } ?>
  • Is there a difference in the speed of execution by the interpreter, classical syntax and alternative syntax?

I.e. between such:

<?
if( $val > 0 ) {
    echo 'yes';
}
else {
    echo 'no';
}
?>

And so:

<?
if( $val > 0 ):
    echo 'yes';
else:
    echo 'no';
endif;
?>

Options.

  • Which of the options for the output of a variable and the results of a function uses less resources, if at all, there is a difference?

This:

<? echo '$value'; ?>

Or this one:

<?=$value?>
Author: angry, 2012-02-24
Source

2 answers

<?
$e = '';
$st = microtime(1);
for ($i = 0; $i < 1000000; $i++) {
  if (1 > 0) {
    echo $e;
  } else echo $e;
}
echo '<br />'.(microtime(1)-$st);

$st = microtime(1);
for ($i = 0; $i < 1000000; $i++) { ?>
<?  if (1 > 0) { ?>
<? echo $e; ?> 
<?  } else { ?>
<? echo $e; ?>
<? } ?>
<? }
echo '<br />'.(microtime(1)-$st);
echo '<hr />';
$st = microtime(1);
for ($i = 0; $i < 1000000; $i++) { ?>
<?  if (1 > 0) { ?>
<?=$e?> 
<?  } else { ?>
<?=$e?> 
<? } ?>
<? }
echo '<br />'.(microtime(1)-$st);

$st = microtime(1);
for ($i = 0; $i < 1000000; $i++) { ?>
<?  if (1 > 0) { ?>
<? echo $e; ?> 
<?  } else { ?>
<? echo $e; ?>
<? } ?>
<? }
echo '<br />'.(microtime(1)-$st);
echo '<hr />';
?>

Result:

0.08100700378418
2.4613921642303
----
3.0508909225464
2.4576618671417

The last 2 changed from "1.5 / 6" to "4/1", so it is more likely the same. And here is the first pair-talking)

UPDATE, syntax

<?
$e = '';
$st = microtime(1);
for ($i = 0; $i < 1000000; $i++) {
  if (1 > 0) {
    echo $e;
  } else echo $e;
}
echo '<br />'.(microtime(1)-$st);

$st = microtime(1);
for ($i = 0; $i < 1000000; $i++) {
  if (1 > 0):
    echo $e;
  else:
    echo $e;
  endif;
}
echo '<br />'.(microtime(1)-$st);
echo '<hr />';
?>

0.089139938354492
0.082063913345337
 3
Author: Sh4dow, 2012-02-24 16:07:35

In my opinion, this is "saving on matches" and it is unlikely that anyone will give an accurate and correct answer

 4
Author: Maksym Prus, 2012-02-24 14:41:58