What are common debugging techniques for PHP scripts when they are not functioning as expected?

One common debugging technique for PHP scripts is to use echo or var_dump statements to output the values of variables at different points in the code to see if they contain the expected data. Another technique is to check for syntax errors or typos in the code, as even a small mistake can cause the script to not function as expected. Additionally, using error reporting functions like error_reporting(E_ALL) and ini_set('display_errors', 1) can help identify and display any errors that occur during the script execution. 

<?php
// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Debugging with echo
$variable = "Hello World";
echo $variable;

// Debugging with var_dump
$array = [1, 2, 3];
var_dump($array);

// Check for syntax errors or typos
// Make sure all variables, functions, and classes are spelled correctly
// Check for missing semicolons, parentheses, or curly braces
?>

Keywords

Xdebug var_dump error_reporting PHP error logs stack trace

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