/**
* Returns the path to a PHP interpreter.
*
* PHPUnit_Util_PHP::$phpBinary contains the path to the PHP
* interpreter.
*
* When not set, the following assumptions will be made:
*
* 1. When the PHP CLI/CGI binary configured with the PEAR Installer
* (php_bin configuration value) is readable, it will be used.
*
* 2. When PHPUnit is run using the CLI SAPI and the $_SERVER['_']
* variable does not contain the string "PHPUnit", $_SERVER['_']
* is assumed to contain the path to the current PHP interpreter
* and that will be used.
*
* 3. When PHPUnit is run using the CLI SAPI and the $_SERVER['_']
* variable contains the string "PHPUnit", the file that $_SERVER['_']
* points to is assumed to be the PHPUnit TextUI CLI wrapper script
* "phpunit" and the binary set up using #! on that file's first
* line of code is assumed to contain the path to the current PHP
* interpreter and that will be used.
*
* 4. The current PHP interpreter is assumed to be in the $PATH and
* to be invokable through "php".
*
* @return string
*/
public static function getPhpBinary()
{
if (self::$phpBinary === NULL) {
if (is_readable('/usr/local/bin/php')) {
self::$phpBinary = '/usr/local/bin/php';
} else {
if (PHP_SAPI == 'cli' && isset($_SERVER['_']) && strpos($_SERVER['_'], 'phpunit') !== FALSE) {
$file = file($_SERVER['_']);
$tmp = explode(' ', $file[0]);
self::$phpBinary = trim($tmp[1]);
}
}
if (!is_readable(self::$phpBinary)) {
self::$phpBinary = 'php';
} else {
self::$phpBinary = escapeshellcmd(self::$phpBinary);
}
}
return self::$phpBinary;
}
