How Can I Measure PHP Script Execution Time?

Getting Script Execution Time in PHP

In PHP, tracking script execution time is crucial for enforcing the max_execution_time limit. But is there a way to access this information from within a script? This question arises when you want to track CPU usage during PHP execution, excluding time spent waiting for database responses.

For Linux-based systems, if you only require wall-clock time (total time since the script's execution started), here's how you can calculate it:

// Start the timer at the beginning of the script
$time_start = microtime(true); 

// Execute your script here

// Stop the timer
$time_end = microtime(true);

// Calculate the execution time
$execution_time = ($time_end - $time_start) / 60; 

// Display the execution time
echo 'Total Execution Time: ' . $execution_time . ' Mins';

Please note that this method includes the time spent waiting for external resources, unlike the max_execution_time which only considers PHP execution time.

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