Essential Books

Reading POST data

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Data from a POST request is stored in the superglobal $_POST in the form of an associative array.

Note that accessing a non-existent array item generates a notice, so existence should always be checked with the isset() or empty() functions, or the null coalesce operator.

Example: 

$from = isset($_POST["name"]) ? $_POST["name"] : "NO NAME";
$message = isset($_POST["message"]) ? $_POST["message"] : "NO MESSAGE";

echo "Message from $from: $message";
$from = $_POST["name"] ?? "NO NAME";
$message = $_POST["message"] ?? "NO MESSAGE";

echo "Message from $from: $message";
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Reading request data:
* Reading Request Data
* Reading raw POST data
* Reading POST data
* Reading GET data
* Passing arrays by POST
* Handling file upload errors
* Uploading files with HTTP PUT
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