PHP特殊字符替换函数

Question

当我更换é时，它变成了é。我在PHP和HTML中使用UTF-8编码。我希望函数返回我放入函数的字符的HTML代码。

function ctrlspecialchars($subject){    
$search = array("<",">","é","à","â","ä","æ","ç","è","ê","ë","ï","î","ò","ó","ô","ö","ø","ù","ú","û","ü","©","®","«","»","¼","½","¾","±","§","¥","£","{","}","$","%");
$replace = array("&lt;","&gt;","&#233;","&#224;","&#226;","&#228;","&#230;","&#231;","&#232;","&#234;","&#235;","&#239;","&#238;","&#242;","&#243;","&#244;","&#246;","&#248;","&#249;","&#250;","&#251;","&#252;","&#169;","&#174;","&#171;","&#187;","&#188;","&#189;","&#190;","&#177;","&#167;","&#165;","&#163;","&#123;","&#125;","&#36;","&#37;");

return str_replace($search,$replace,$subject); 
 }

Answer 1

尝试charset：iso-8859-1而不是UTF-8或确保在html标头中设置charset：

PHP : header('Content-type: text/html; charset=utf-8');
HTML: <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

Answer 2

由于我复制了你的代码并且它在我的本地环境中工作正常，你的问题不应该在代码中，而应该是编码。

我不知道您的编码需求（可能需要在某些页面中打印一些特殊字符），但出于测试目的，请尽量保持系统的所有部分都使用UTF-8。 按照@ user2879055的答案提示，配置数据库以使用utf8_general_ci并确保您的PHP文件以UTF-8编码。

请参阅下面我的编辑器（我正在使用Atom）配置为以UTF-8编码文件的图像。大多数编辑器都有类似的配置。如果您的编辑器有两个UTF-8选项（有和没有BOM），请选择不带BOM（信息here）。

最后，如果您使用的是Apache，请将行IndexOptions +Charset=UTF-8添加到.htacces。

在这些测试中避免使用utf8_enconding和utf8_decode函数。

当它工作时，更改每个步骤的enconding配置并进行测试，这样当代码再次失败时，您将找到问题所在。现在，您可以根据您的需求配置您的环境，并仅针对有问题的部分开展工作。

只是FIY，我在var_dump(ctrlspecialchars("<ó äî ò æ ç % ®>"));使用您的功能，我的浏览器显示/var/www/html/replace.php:10:string '<ó äî ò æ ç % ®>' (length=61)。