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1. Html A Href

NotesNote:Be careful about variables that may match HTML entities. Things like&, © and £ are parsed by the browser and theactual entity is used instead of the desired variable name. This is anobvious hassle that the W3C has been telling people about for years.The reference is here:.PHP supports changing the argument separator to the W3C-suggestedsemi-colon through the argseparator.ini directive. Unfortunately mostuser agents do not send form data in this semi-colon separated format.A more portable way around this is to use & instead of & asthe separator. You don't need to change PHP's argseparator for this.Leave it as &, but simply encode your URLs usingor. Keep in mind that, if you prepare URL for a connection and used the urlencode on some parameters and didn't use it on the rest of parameters, it will not be decoded automatically at the destination position if the not encoded parameters have special characters that urlencode encodes it.example:$xml = simplexmlloadfile('.urlencode('dummy string').'

&second=here is the string');here is the second parameter has spaces which urlencode converts it to (+).after using this URL, the server will discover that the second parameter has not been encoded, then the server will not decode it automatically.this took more than 2 hours to be discovered and hope to save your time. If you have a url like this: test-blablabla-43-y-3 look on index.phparray (size=0)emptytest-bla-bla-4%253E2-y-3%253C6look on test-bla-bla-4%253E2-y-3%253C6array (size=1)'token' = string 'bla-bla-42-y-3. If you want to pass a url with parameters as a value IN a url AND through a javascript function, such as.pass the url value through the PHP urlencode function twice, like this.' ;?On the page being opened by the javascript function (page.php), you only need to urldecode once, because when javascript 'touches' the url that passes through it, it decodes the url once itself.

Html A Href

So, just decode it once more in your PHP script to fully undo the double-encoding.If you don't do this, you'll find that the result url value in the target script is missing all the var=values following the? Question mark.index.php?id=4.

Constructing hyperlinks safely HOW-TO:';echo ', htmlspecialchars ( $linklabel ), ';?This example covers all the encodings you need to apply in order to create URLs safely without problems with any special characters. It is stunning how many people make mistakes with this.Shortly:- Use urlencode for all GET parameters (things that come after each '=').- Use rawurlencode for parts that come before '?' .- Use htmlspecialchars for HTML tag parameters and HTML text content.