How can PHP beginners ensure that variables are correctly passed and retained in their code?

PHP beginners can ensure that variables are correctly passed and retained in their code by using proper variable naming conventions, checking for typos or syntax errors, and understanding variable scope. They should also utilize built-in PHP functions like $_GET, $_POST, or $_SESSION to pass and retain variables across different pages or requests. 

<?php
// Example of passing and retaining variables using $_GET
if(isset($_GET['name'])){
    $name = $_GET['name'];
    echo "Hello, $name!";
}
?>

<!-- HTML form to pass the variable 'name' -->
<form action="example.php" method="get">
    <input type="text" name="name">
    <input type="submit" value="Submit">
</form>

Keywords

variable scope global keyword superglobal arrays function parameters variable passing

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