Protecting Special Characters in Query String in PHP
How To Protect Special Characters in Query String in PHP?
If you want to include special characters like spaces in the query string, you need to protect them by applying the urlencode() translation function. The script below shows how to use urlencode():
<?php print("<html>"); print("<p>Please click the links below" ." to submit comments about FYICenter.com:</p>"); $comment = 'I want to say: "It\'s a good site! :->"'; $comment = urlencode($comment); print("<p>" ."<a href=\"processing_forms.php?name=Guest&comment=$comment\">" ."It's an excellent site!</a></p>"); $comment = 'This visitor said: "It\'s an average site! :-("'; $comment = urlencode($comment); print("<p>" .'<a href="processing_forms.php?'.$comment.'">' ."It's an average site.</a></p>"); print("</html>"); ?>
If you copy this script as submit_comments.php to your Web server, and click the first link, you will get:
query_string = name=Guest&comment= I+want+to+say%3A+%22It%27s+a+good+site%21+%3A-%3E%22 Number of values: 2 name = Guest comment = I want to say: "It's a good site! :->"
If you click the second link, you will get:
query_string = This+visitor+said%3A+%22It%27s+an+average+site%21+%3A-%28%22 Number of values: 1 This_visitor_said:_\"It\'s_an_average_site!_:-(\" =
Now you know that urlencode() all special characters into HEX numbers. To translate them back, you need to apply urldecode().
2016-11-05, 413👍, 0💬
Can You Add Values to an Array without Keys in PHP? Can You Add Values to an Array with a Key? The a...
How To Add Column Headers to a Table? If you want to add column headers to a table, you need to use ...
How To Pad an Array with the Same Value Multiple Times in PHP? If you want to add the same value mul...
How To Write a String to a File with a File Handle in PHP? If you have a file handle linked to a fil...
How To Copy Array Values to a List of Variables in PHP? If you want copy all values of an array to a...