PHP Echoing JSON string into HTML Input value - Need character escape

问题

Here is a simplified version of my code that I am having a problem with.

$variable = "{\\\"JSON" //long JSON string created in Javascript with JSON.stringify
?> <input type="text" name="somename" value="<?php echo $variable; ?>"/> <?php

The input box only contains {\ I need a way to escape the entire JSON string

Thanks Alex

回答1:

You're outputting into an HTML context, so you need html-specific escaping:

<input ... value="<?php echo htmlspecialchars(json_encode($whatever)); ?>" />
                             ^^^^^^^^^^^^^^^^----

来源：https://stackoverflow.com/questions/21887228/php-echoing-json-string-into-html-input-value-need-character-escape