note 34097 added to function.str-replace
| From: | nobody at hackingbord dot de | Date: | Wed, 16 Jul 2003 10:13:17 +0000 |
| Subject: | note 34097 added to function.str-replace | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-52185@lists.php.net to get a copy of this message | ||
on 25-Feb-2003 12:31, igjav at cesga dot es wrote:"So am I wrong if I say that str_replace
doesn't makes sense,..."
yes, you are. the difference between both functions ist the speed of execution. if you want to
replace only single characters, it is faster to use strtr(). but if you want to replace bigger parts
of a string, you'd better use str_replace. it is much, much faster in this case.
try the following script to see what i mean.
<?php
$starttime = microtime();
$text = "abcdefg xyz aeoeue abcdefg xyz aeoeue abcdefg xyz aeoeue abcdefg xyz aeoeue";
$array = array("f" => "fff", "a" => "aaa",
"e" => "eee");
$text2 = strtr($text,$array);
$endtime = microtime();
$starttime = explode(' ', $starttime);
$endtime = explode(' ', $endtime);
$time = round(($endtime[0] + $endtime[1]) - ($starttime[0] + $starttime[1]),6);
echo $time,"<br >";
echo $text2,"<br >";
$starttime = microtime();
$text = "abcdefg äöü aeoeue abcdefg äöü aeoeue abcdefg äöü aeoeue abcdefg äöü
aeoeue ";
$array1 = array("f", "a", "e");
$array2 = array("fff", "aaa", "eee");
$text2 = str_replace($array1,$array2,$text);
$endtime = microtime();
$starttime = explode(' ', $starttime);
$endtime = explode(' ', $endtime);
$time = round(($endtime[0] + $endtime[1]) - ($starttime[0] + $starttime[1]),6);
echo $time,"<br >";
echo $text2;
?>
----
Manual Page -- http://www.php.net/manual/en/function.str-replace.php
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