如何使用php将此（'）字符转换为html实体？

Question

I want to make this character (′) html entity for storing in my database using php. I am using MySQL databse. I use:

$string = "HTML5′s placeholder Attribute";
$newStr = htmlspecialchars($string, ENT_QUOTES);
echo $newStr;

the above code prints the following

HTML5â?²s placeholder Attribute 

How can I make this (′) character an HTML entity?

Answer 1

You need to use htmlentities() here, as that specific quote thingy does not need escaping normally. And you also need to specifiy the charset, as you otherwise get those Latin-1 equivalent escapes:

echo htmlentities("′", ENT_QUOTES, "UTF-8");

Should either get you ′ or ′ as result.