php - PHP 的 str_replace 替代方案

Question

在 str_replace manual对于 PHP，它声明如下:

Because str_replace() replaces left to right, it might replace a previously inserted value when doing multiple replacements. See also the examples in this document.

是否有没有此问题的等效功能，或者我如何安全地执行此操作？

Answer 1

您正在寻找 strtr ( string $str , array $replace_pairs ) .

If given two arguments, the second should be an array in the form array('from' => 'to', ...). The return value is a string where all the occurrences of the array keys have been replaced by the corresponding values. The longest keys will be tried first. Once a substring has been replaced, its new value will not be searched again.

手册中的示例:

<?php
$trans = array("h" => "-", "hello" => "hi", "hi" => "hello");
echo strtr("hi all, I said hello", $trans);
?>

将输出:

hello all, I said hi

这应该正是您所需要的。