What are some common debugging techniques for resolving issues with PHP scripts that involve passing values between pages?

Issue: When passing values between pages in PHP scripts, it is common to encounter errors due to incorrect variable names, improper data formatting, or missing data. To resolve these issues, it is important to carefully check the variable names and data types being passed between pages to ensure consistency. Additionally, using PHP built-in functions like isset() and empty() can help validate the data being passed. 

// Example code snippet for passing values between pages in PHP

// Page 1: Sending data
$data = "Hello World";
header("Location: page2.php?data=" . urlencode($data));
exit;

// Page 2: Receiving data
if(isset($_GET['data'])) {
    $receivedData = urldecode($_GET['data']);
    echo $receivedData;
} else {
    echo "No data received";
}

Keywords

var_dump $_GET $_POST $_SESSION error_reporting

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