使用正则表达式检查 PHP 中 url 的 IF 语句

Question

I would like to change the language of my content on my search results template. Since the Spanish versions of each page are in a sub-directory /es/ I have been able to successfully manage content with Javascript using some simple RegEx. However, this template is in a .php file. How can I check to see if the page is in the /es/ sub-directory?

Here is my initial thinking (obvious syntax issue, just tried to get structure going):

<?php
    $spanishPage = "/.*\/es\//"; 
     if (preg_match($spanishPage, $_SERVER['REQUEST_URI'])) { ?>
        <h2>Spanish results for: <span><?php the_search_query(); ?></span></h2>
     <?php
     }
     else { ?>
        <h2>English results for: <span><?php the_search_query(); ?></span></h2>
    <?php
    } ?>

Using strpos:

<?php 
                            $spanishPage = "/.*\/es\//"; 
                            if (strpos($_SERVER['REQUEST_URI'], $spanishPage)) {
                                echo 'This is spanish page';
                            }
                            else {
                                echo 'this is an english page';
                            }
                        ?>

Answer 1

The slashes in $spanishPage are for regular expressions, strpos doesn't use them

<?php

// a regular expression that will get a language code out of a URL 
$regEx = '#/(\w\w)/(.*)$#';

// use the regex with the request URL
if(preg_match_all($regEx,'https://www.example.com/es/my-page.php',$matches)) {
        if (is_dir($matches[1][0])) {
                echo 'Directory is '.$matches[1][0].PHP_EOL;
                echo 'Page is '.$matches[2][0];
                if (!is_file($matches[2][0])) {
                        echo ' not found';
                }
        } else {
                echo 'Directory '.$matches[1][0].' doesn\'t exist'.PHP_EOL;
        }
}