How can you check if a specific $_GET key is present in PHP?

To check if a specific $_GET key is present in PHP, you can use the isset() function. This function checks if a variable is set and is not NULL. By using isset($_GET['key']), you can determine if the specified key exists in the $_GET superglobal array. 

if(isset($_GET['key'])) {
    // Key exists in the $_GET array
    // Add your code here
} else {
    // Key does not exist in the $_GET array
}

Keywords

PHP $_GET key isset validation

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