popen - PHP code example

PHP Function Popen

The php function popen is a powerful tool that can be used to spawn and interact with a shell command from within a script. It uses a pipe to pass input and output between the parent process and the child process. The parent process can read the output from the child process using fgets() or write to the child process using fwrite(). In addition, it can set the return code or output from the child process.

The mode parameter sets whether the pipe is opened for reading (r) or writing (w). It can also be set to a special value of 'none', which opens the pipe in a non-standard way. The 'none' mode is not supported by all platforms, so it is recommended to always use r or w.

Args is the sequence of program arguments passed to the command. Output is a stream or string containing the output of the command. Capture_output is a boolean value that indicates if stdout and stderr should be captured. This argument is ignored if stdin=PIPE or capture_errors is not set.

If the args and output are not available or not as expected, a ValueError is raised. If the args and output are available, a CalledProcessError is raised. The attributes of this exception hold the args, the return code, and stdout and stderr if they were captured.

The pclose() function closes the file pointer initiated by popen(). This is the same as closing a file created by fopen(), except that it will not close the child process. It will only close the stream if the termination status of the child process is not -1.

popen example

    function _fromGlibCTest()
    {
        $major = null;
        $minor = null;

        $tmpfile = System::mktemp("glibctest");
        $fp = fopen($tmpfile, "w");
        fwrite($fp, "#include <features.h>\n__GLIBC__ __GLIBC_MINOR__\n");
        fclose($fp);
        $cpp = popen("/usr/bin/cpp $tmpfile", "r");
        while ($line = fgets($cpp, 1024)) {
            if ($line[0] == '#' || trim($line) == '') {
                continue;
            }

            if (list($major, $minor) = explode(' ', trim($line))) {
                break;
            }
        }
        pclose($cpp);
        unlink($tmpfile);

        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->ping(...\func_get_args());
    }

    public function pipeline(): \Redis|bool
    {
        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->pipeline(...\func_get_args());
    }

    public function popen($host, $port = 6379, $timeout = 0, $persistent_id = null, $retry_interval = 0, $read_timeout = 0, $context = null): bool
    {
        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->popen(...\func_get_args());
    }

    public function psetex($key, $expire, $value): \Redis|bool
    {
        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->psetex(...\func_get_args());
    }

    public function psubscribe($patterns, $cb): bool
    {
        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->psubscribe(...\func_get_args());
    }

            $sendmailFmt = '%s -oi -t';
        }

        $sendmail = sprintf($sendmailFmt, escapeshellcmd($this->Sendmail), $this->Sender);
        $this->edebug('Sendmail path: ' . $this->Sendmail);
        $this->edebug('Sendmail command: ' . $sendmail);
        $this->edebug('Envelope sender: ' . $this->Sender);
        $this->edebug("Headers: {$header}");

        if ($this->SingleTo) {
            foreach ($this->SingleToArray as $toAddr) {
                $mail = @popen($sendmail, 'w');
                if (!$mail) {
                    throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL);
                }
                $this->edebug("To: {$toAddr}");
                fwrite($mail, 'To: ' . $toAddr . "\n");
                fwrite($mail, $header);
                fwrite($mail, $body);
                $result = pclose($mail);
                $addrinfo = static::parseAddresses($toAddr, true, $this->CharSet);
                $this->doCallback(
                    ($result === 0),
                    [[

    protected function sendWithSendmail()
    {
        // _validate_email_for_shell() below accepts by reference,         // so this needs to be assigned to a variable         $from = $this->cleanEmail($this->headers['From']);

        $from = $this->validateEmailForShell($from) ? '-f ' . $from : '';

        if (! function_usable('popen') || false === ($fp = @popen($this->mailPath . ' -oi ' . $from . ' -t', 'w'))) {
            return false;
        }

        fwrite($fp, $this->headerStr);
        fwrite($fp, $this->finalBody);
        $status = pclose($fp);

        if ($status !== 0) {
            $this->setErrorMessage(lang('Email.exitStatus', [$status]));
            $this->setErrorMessage(lang('Email.noSocket'));

        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->listTrim(...\func_get_args());
    }

    public function open($host, $port = null, $timeout = null, $retry_interval = null)
    {
        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->open(...\func_get_args());
    }

    public function popen($host, $port = null, $timeout = null)
    {
        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->popen(...\func_get_args());
    }

    public function renameKey($key, $newkey)
    {
        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->renameKey(...\func_get_args());
    }

    public function sContains($key, $value)
    {
        return ($this->lazyObjectState->realInstance ??= ($this->lazyObjectState->initializer)())->sContains(...\func_get_args());
    }