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GUI to analyze the profiling data collected using XHProf – A Hierarchical Profiler for PHP.
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To begin with, you need to install the XHProf extension. Refer to the PHP documentation if you need assistance.

You will need to manually create the database and populate it with the provided scheme. The database scheme is located at /setup/database.sql.

Rename the /xhprof/includes/ to /xhprof/includes/ There are only two supported parameters.

  • xhprof_url is the URL to the library.
  • pdo is the PDO instance. This library uses PDO to handle all of the database operations.
  • enable is a closure to control when enable data collection, return true means always enable

Some cases for reference:

Alway enable

'enable' => function() {
     return true;

Enable if url contents debug parameter:

'enable' => function() {
    if (!empty($_GET['debug'])) {
        return true;

Enable for 1/100 probability

'enable' => function() {
    return rand(0, 100) === 42;

Enable for url path is /:

'enable' => function() {
    if (parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) === '/') {
        return true;

For to start collecting data, you need /inc/inject.php files included to every file of interest. The recommended approach is to update your php.ini configuration to automatically prepend and append these files.

auto_prepend_file = /[absolute path to]/inc/inject.php

If you use nginx, you could configuration auto_prepend_file as a fastcgi_param

fastcgi_param  PHP_VALUE "auto_prepend_file=/[absolute path to]/inc/inject.php";

If you are using PHP-FPM, then will utilise fastcgi_finish_request to hide any overhead related to data collection. There is nothing to worry about if you are not using PHP-FPM either, as the overhead is less than a few milliseconds.

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