21     private static $binary;  variable in SebastianBergmann\\Environment\\Runtime
43         if (self::$binary === null && $this->isHHVM()) {
44             if ((self::$binary = getenv('PHP_BINARY')) === false) {
45                 self::$binary = PHP_BINARY;
48             self::$binary = escapeshellarg(self::$binary) . ' --php';
52         if (self::$binary === null && defined('PHP_BINARY')) {
54                 self::$binary = escapeshellarg(PHP_BINARY);
59         if (self::$binary === null) {
66                         self::$binary = escapeshellarg(trim($tmp[1]));
68                         self::$binary = escapeshellarg(ltrim(trim($file[0]), '#!'));
71                     self::$binary = escapeshellarg($_SERVER['_']);
76         if (self::$binary === null) {
83             foreach ($possibleBinaryLocations as $binary) {
84                 if (is_readable($binary)) {
85                     self::$binary = escapeshellarg($binary);
91         if (self::$binary === null) {
92             self::$binary = 'php';
95         return self::$binary;