php string replace quotes

问题

Hello I am trying to get all single quotes to be double quotes using the php str_replace however it does not seem to be working no matter what I do, suggestions

$page = str_replace("/'/", '/"/', $page);

回答1:

Update: I'd agree with others that the following is an easier-to-read alternative for most folks:

$page = str_replace("'", '"', $page);

My original answer:

$page = str_replace(chr(39), chr(34), $page);

回答2:

You don't need to escape the quote character (in fact it is \, not /, unless you were confused with the standard regex delimiters) if the string isn't delimited with the same character.

$page = str_replace("'", '"', $page);

回答3:

This should work:

str_replace("'",'"',$text);

回答4:

$page = str_replace("'", "\"", $page);

回答5:

I think you should do replacements with preg_replace();

$str = "'Here 'it' goes'";
echo preg_replace("/'/", '"', $str);

回答6:

This works. You actually don't need any escaping character.

$page = str_replace("'", '"', $page);

回答7:

You only need the start and end / for preg_...() (and other regex) functions. For basic functions such as str_replace, simply use the characters:

str_replace("'", '"', $text);

来源：https://stackoverflow.com/questions/10200127/php-string-replace-quotes