PhutilExecutionEnvironment.php
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PhutilExecutionEnvironment.php
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	<?php

	/**
	* Get information about the current execution environment.
	*/
	final class PhutilExecutionEnvironment extends Phobject {

	public static function getOSXVersion() {
	if (php_uname('s') != 'Darwin') {
	return null;
	}

	return php_uname('r');
	}

	/**
	* If the PHP configuration setting "variables_order" does not include "E",
	* the `$_ENV` superglobal is not populated with the containing environment.
	* For details, see T12071.
	*
	* This can be fixed by adding "E" to the configuration, but we can also
	* repair it ourselves by re-executing a subprocess with the configuration
	* option defined to include "E". This is clumsy, but saves users from
	* needing to go find and edit their PHP files.
	*
	* @return void
	*/
	public static function repairMissingVariablesOrder() {
	$variables_order = ini_get('variables_order');
	$variables_order = strtoupper($variables_order);

	if (strpos($variables_order, 'E') !== false) {
	// The "variables_order" option already has "E", so we don't need to
	// repair $_ENV.
	return;
	}

	list($env) = execx(
	'php -d variables_order=E -r %s',
	'echo json_encode($_ENV);');
	$env = phutil_json_decode($env);

	$_ENV = $_ENV + $env;
	}

	}