using php to encode characters for mailto in javascript?

I am using window.location.href = 'mailto:?body=visit http://example.com/?content=link';

which works fine, but the way the link is built is window.location.href = 'mailto:?body=<?php echo $content; ?>';

now this works fine unless $content contains ' or something sim开发者_开发问答ilar which breaks the code.

How can I make this work?

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Use the rawurlencode function^{[php docs]} to encode any characters in your input that aren't valid in URLs.

<?php $content = "Hello, this' an...\n\nexample!"; ?>
window.location.href = "mailto:?body=<?php echo rawurlencode($content); ?>";

Output:

window.location.href = "mailto:?body=Hello%2C%20this%27%20an...%0A%0Aexample%21";

It is true that you normally would want to use addslashes^{[php docs]} when you're putting something in a quoted string. In this case it would have no effect because the output of rawurlencode doesn't have any characters that need to be escaped with slashes.

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You might want to use addslashes, which escapes the quotes.

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Use rawurlencode():

window.location.href = 'mailto:?body=<?php echo rawurlencode($content); ?>';