PhpFpmEnvironment.php
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	#!/usr/bin/env php
	<?php

	/**
	* Allows to get the content of a php-fpm environment configuration file
	*/
	class PhpFpmEnvironment {
	/**
	* The temporary directory, used in TMP, TEMP and TMPDIR environment variables
	* @var string
	*/
	const TMP = '/tmp';

	/**
	* The path where to find executables, where sbin should be excluded if you don't run PHP as root.
	* @var string
	*/
	const PATH = '/usr/local/bin:/usr/bin:/bin';

	/**
	* The environment variables to discard
	* @var Array
	*/
	const VARIABLES_TO_DISCARD = [
	'_', // The caller executable script, not pertinent
	'HOME', // Set correctly by php-fpm
	'TERM', // Not pertinent in server context
	'MYSQL_ENV_MYSQL_ROOT_PASSWORD', // from --link …:mysql
	];

	/**
	* Gets an environment array from the current process environment,
	* with PATH and temp variablesfiltered.
	*
	* @return Array
	*/
	public static function getEnvironmentVariables () {
	$variables = [];

	foreach ($_ENV as $key => $value) {
	if (!static::mustIgnoreVariable($key)) {
	$variables[$key] = $value;
	}
	}

	static::addHardcodedEnvironmentVariables($variables);

	return $variables;
	}

	/**
	* Adds hardcoded and always wanted environment variables
	* (path, temporary directory) to the specified array.
	*
	* @paran array $variables the array to add the variables to
	*/
	public static function addHardcodedEnvironmentVariables (&$variables) {
	static::addTempEnvironmentVariables ($variables);
	static::addPathEnvironmentVariables ($variables);
	}

	/**
	* Adds temporary directory environment variables to the specified array.
	*
	* @paran array $variables the array to add the variables to
	*/
	public static function addTempEnvironmentVariables (&$variables) {
	$variables['TMP'] = static::TMP;
	$variables['TEMP'] = static::TMP;
	$variables['TMPDIR'] = static::TMP;
	}

	/**
	* Adds temporary directory environment variables to the specified array.
	*
	* @paran array $variables the array to add the variables to
	*/
	public static function addPathEnvironmentVariables (&$variables) {
	$variables['PATH'] = static::PATH;
	}

	/**
	* Determines if the variable name must be ignored
	*
	* @return bool true if the variable must be ignored; otherwise, false.
	*/
	public static function mustIgnoreVariable ($variableName) {
	return in_array($variableName, static::VARIABLES_TO_DISCARD);
	}

	/**
	* Prints the environment
	*/
	public static function printConfig () {
	$variables = static::getEnvironmentVariables();

	foreach ($variables as $key => $value) {
	echo 'env["', $key, '"] = "', $value, '"', PHP_EOL;
	}
	}
	}

	PhpFpmEnvironment::printConfig();

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