关于 PHP 对一篇文章批量替换 不同的值!

<code><?php function f1_strtr() {
  for($i=0; $i<1000000; ++$i) {
    $new_string = strtr("aboutdealers.com", array(".com" => ""));
  }
  return $new_string;
}
function f2_str_replace() {
  for($i=0; $i time str_replace => ' . ($time_strtr > $time_str_replace);
?>
--------------------------------------
time strtr       : 3.9719619750977      result :aboutdealers
time str_replace : 2.9930369853973      result :aboutdealers
time strtr > time str_replace => 1

str_replace is faster than strtr</code>

<code>Be careful when replacing characters (or repeated patterns in the FROM and TO arrays): 

For example: 

<?php $arrFrom = array("1","2","3","B"); 
$arrTo = array("A","B","C","D"); 
$word = "ZBB2"; 
echo str_replace($arrFrom, $arrTo, $word); 
?> 

I would expect as result: "ZDDB" 
However, this return: "ZDDD" 
(Because B = D according to our array) 

To make this work, use "strtr" instead: 

<?php $arr = array("1" => "A","2" => "B","3" => "C","B" => "D"); 
$word = "ZBB2"; 
echo strtr($word,$arr); 
?> 

This returns: "ZDDB"</code>

<code>$str = '我们的祖国是花园,花园的花朵真鲜艳';
$result = str_replace(array('祖国','花朵'), array('motherland','flowers'), $str);
echo $result;</code>