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How to get the current executable's path in PHP


Example 1


 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;

Example 2


<?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;
    }


Conclusion

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