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I'm making a search page, where you type a search query and the form is submitted to search.php?query=your query. What PHP function is the best and that I should use for encoding/decoding the search query?
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In JavaScript, PHP, and ASP there are functions that can be used to URL encode a string. PHP has the rawurlencode() function, and ASP has the Server. URLEncode() function. In JavaScript you can use the encodeURIComponent() function.
Definition and UsageThe utf8_encode() function encodes an ISO-8859-1 string to UTF-8. Unicode is a universal standard, and has been developed to describe all possible characters of all languages plus a lot of symbols with one unique number for each character/symbol.
A space is assigned number 32, which is 20 in hexadecimal. When you see “%20,” it represents a space in an encoded URL, for example, http://www.example.com/products%20and%20services.html.
For the URI query use urlencode/urldecode; for anything else use rawurlencode/rawurldecode.
The difference between urlencode and rawurlencode is that
urlencode encodes according to application/x-www-form-urlencoded (space is encoded with +) whilerawurlencode encodes according to the plain Percent-Encoding (space is encoded with %20).
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The cunningly-named urlencode() and urldecode().
However, you shouldn't need to use urldecode() on variables that appear in $_POST and $_GET.
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