使用PHP解码字符串

Question

I'm trying to decode a string using PHP but it doesn't seem to be returning the correct result.

I've tried using html_entity_decode as well as utf8_decode(urldecode())

Current code:

$str = "joh'@test.com";
$decodeStr = html_entity_decode($str, ENT_COMPAT, "UTF-8");

Expected return is john@test.com

Answer 1

I suppose your html entity code for character 'n' is wrong. Working example:

$str = "john@test.com";
echo $decodeStr = html_entity_decode($str, ENT_COMPAT, "UTF-8");

Answer 2

Shouldn't the entity for @ be @ instead of ' which is for an apostrophe?

Answer 3

The HTML entity code for n is n , whereas the entity code in your string is for a single apostrophe ' . If you wanted to convert single quotes, the ENT_QUOTES flag must be used when calling html_entity_decode() , as the default is ENT_COMPAT | ENT_HTML401 ENT_COMPAT | ENT_HTML401 (from the PHP docs ) which doesn't convert single quotes. If you need additional flags, you can "add" them using the pipe | symbol like this: ENT_HTML401 | ENT_QUOTES ENT_HTML401 | ENT_QUOTES .

If you're expecting john@test.com :

$str = "john@test.com";
$decodeStr = html_entity_decode($str, ENT_COMPAT, "UTF-8");
echo $decodeStr;  // john@test.com

Or if you're expecting joh'@test.com :

$str = "joh'@test.com";
$decodeStr = html_entity_decode($str, ENT_QUOTES, "UTF-8");
echo $decodeStr; // joh'@test.com