What are some common mistakes when passing variables between PHP files in PHP?

One common mistake when passing variables between PHP files is not using sessions or cookies to maintain the variable's value across different pages. To solve this issue, you can store the variable in a session or cookie and then retrieve it in the target PHP file. 

// Source PHP file
session_start();
$_SESSION['variable_name'] = $value;

// Target PHP file
session_start();
$variable = $_SESSION['variable_name'];

Keywords

scope include require global variable interpolation

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