PHP foreach用数组覆盖值 [英] PHP foreach overwrite value with array

问题描述

我正在制作一个简单的PHP模板系统，但遇到一个我无法解决的错误，问题是布局加载效果很好，但是很多次，无法弄清楚如何解决，这里是我的代码

I'm making a simple PHP Template system but I'm getting an error I cannot solve, the thing is the layout loads excellent but many times, can't figure how to solve, here my code

Class Template {

private $var = array();

public function assign($key, $value) {

    $this->vars[$key] = $value;

}

public function render($template_name) {

    $path = $template_name.'.tpl';
    if (file_exists($path)) {

        $content = file_get_contents($path);

        foreach($this->vars as $display) {


            $newcontent = str_replace(array_keys($this->vars, $display), $display, $content);
            echo $newcontent;

        }

    } else {

        exit('<h1>Load error</h1>');

    }
}

}

输出为

标题为：欢迎使用我的模板系统

Title is : Welcome to my template system

贷方为[贷方]

标题为：[标题]

贷方对Alvaritos的贷方

Credits to Credits to Alvaritos

您可以看到这是错误的，但不知道如何解决。

As you can see this is wrong, but don't know how to solve it.

推荐答案

最好使用 strtr ：

$content = file_get_contents($path);
$new = strtr($content, $this->vars);
print $new;

str_replace（）在定义键的顺序。如果您有像 array（'a'=> 1，'aa'=> 2）这样的变量和像 aa ，您将获得 11 而不是 2 。 strtr（）会在替换之前按长度对键进行排序（从高到低），这样就不会发生。

str_replace() does the replaces in the order the keys are defined. If you have variables like array('a' => 1, 'aa' => 2) and a string like aa, you will get 11 instead of 2. strtr() will order the keys by length before replacing (highest first), so that won't happen.

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