从脚本中获取当前PHP可执行文件?

值得注意的是,现在在php5.4+中可以使用预定义的常量 PHP_BINARY :

指定脚本执行期间的PHP二进制路径。从PHP5.4开始提供。

我找到了一个预定义的常量: PHP_BIN_DIR

$php_cmd = PHP_BIN_DIR.'/php' 指向我的PHP可执行文件。

httpd 二进制(在Windows上) XAMPP

    if (defined('PHP_BINARY') &&
                PHP_BINARY &&
                in_array(PHP_SAPI, array('cli', 'cli-server')) &&
                is_file(PHP_BINARY)) {

          return PHP_BINARY;
    } else if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
        $paths = explode(PATH_SEPARATOR, getenv('PATH'));
        foreach ($paths as $path) {
            if (substr($path, strlen($path)-1) == DIRECTORY_SEPARATOR) {
                $path = substr($path, 0, strlen($path)-1);
            }
            if (substr($path, strlen($path) - strlen('php')) == 'php') {
                $response = $path.DIRECTORY_SEPARATOR . 'php.exe';
                if (is_file($response)) {
                    return $response;
                }
            } else if (substr($path, strlen($path) - strlen('php.exe')) == 'php.exe') {
                if (is_file($response)) {
                    return $response;
                }
            }
        }
    } else {
        $paths = explode(PATH_SEPARATOR, getenv('PATH'));
        foreach ($paths as $path) {
            if (substr($path, strlen($path)-1) == DIRECTORY_SEPARATOR) {
                $path = substr($path, strlen($path)-1);
            }
            if (substr($path, strlen($path) - strlen('php')) == 'php') {
                if (is_file($path)) {
                    return $path;
                }
                $response = $path.DIRECTORY_SEPARATOR . 'php';
                if (is_file($response)) {
                    return $response;
                }
            }
        }
    }
    return null;

好吧,这很难看,但它在Linux上工作:

<?php
    // Returns the full path of the current PHP executable
    function get_proc_name(){
       // Gets the PID of the current executable
       $pid = posix_getpid();

       // Returns the exact path to the PHP executable.
       $exe = exec("readlink -f /proc/$pid/exe");
       return $exe;
    }

tasklist 可以提供可执行文件的名称,但不能提供可执行文件所在的完整路径。我只能找到一个给定PID的完整路径的例子 C++ AutoHotkey 诸如此类。如果有人对我还能去哪里有什么建议,请告诉我。

附言:为了得到 PID 在PHP for Windows中,显然必须调用 getmypid()

你可以用 phpversion() 在执行“内部”脚本之前获取当前版本的PHP。

对答案不满意后,我想出了自己的答案。它试图利用 PHP_BINARY

/**
 * Return a suitable PHP interpreter that is likely to be the same version as the
 * currently running interpreter.  This is similar to using the PHP_BINARY constant, but
 * it will also work from within mod_php or PHP-FPM, in which case PHP_BINARY will return
 * unusable interpreters.
 *
 * @return string
 */
public function getPhpInterpreter(): string {
    static $cachedExecutable = null;

    if ($cachedExecutable !== null) {
        return $cachedExecutable;
    }

    $basename = basename(PHP_BINARY);

    // If the binary is 'php', 'php7', 'php7.3' etc, then assume it's a usable interpreter
    if ($basename === 'php' || preg_match('/^php\d+(?:\.\d+)*$/', $basename)) {
        return PHP_BINARY;
    }

    // Otherwise, we might be running as mod_php, php-fpm, etc, where PHP_BINARY is not a
    // usable PHP interpreter.  Try to find one with the same version as the current one.

    $candidates = [
        'php' . PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION . '.' . PHP_RELEASE_VERSION,
        'php' . PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION,
        'php' . PHP_MAJOR_VERSION,
    ];

    $envPath = $_SERVER['PATH'] ?? '';
    $paths = $envPath !== '' ? explode(':', $envPath) : [];

    if (!in_array(PHP_BINDIR, $paths, true)) {
        $paths[] = PHP_BINDIR;
    }

    foreach ($candidates as $candidate) {
        foreach ($paths as $path) {
            $executable = $path . DIRECTORY_SEPARATOR . $candidate;
            if (is_executable($executable)) {
                $cachedExecutable = $executable;
                return $executable;
            }
        }
    }

    // Fallback, if nothing else can be found
    $cachedExecutable = 'php';
    return $cachedExecutable;
}

让我知道这是否适合你。我在Debian Buster上测试了它,包括CLI和FPM。

findPHP()

$lookIn可能会扩展到包括更常见的位置。

您可以尝试分析 phpinfo()

我认为最好的常数是 PHP_BINARY . 使用PHP5.5.12。