How can PHP be used to extract URL parameters for prefilling input fields?

To extract URL parameters in PHP for prefilling input fields, you can use the $_GET superglobal array. This array contains key-value pairs of parameters passed in the URL. You can then use these parameters to prefill input fields on a form by echoing the parameter values within the input field's value attribute. 

<input type="text" name="username" value="<?php echo isset($_GET['username']) ? $_GET['username'] : ''; ?>">
<input type="email" name="email" value="<?php echo isset($_GET['email']) ? $_GET['email'] : ''; ?>">
<input type="password" name="password" value="">

Keywords

PHP URL parameters input fields extraction prefilling

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