How I can run a php inline script and also provide command line arguments using bash?

Question

I try to make a simple script that pings a network connection:

#!/usr/bin/env bash

# Xdebug ip detector for docker
# Copyright (C) 2023 Dimitrios Desyllas
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.


SCRIPT=$(cat << 'EOM'
<?php

define('ERROR',"\033[0;31m");
define('OK',"\033[0;32m");
define('HIGILIGHT',"\033[0;96m");
define('HIGILIGHT2',"\033[1;33;4;44m");
define('HIGILIGHT_ERROR',"\033[0;95m");

define('NC',"\033[0m");

if(count($argv) < 2){
    echo HIGILIGHT_ERROR." No IP and port provided".NC.PHP_EOL;
    exit(-1);
}

$host = $argv[1];

$host_parts = explode(":",$host);

$host = $host_parts[0];

if(isset($host_parts[1])){
    $port=$host_parts[1];
} elseif(isset($argv[2])){
    $port = $argv[2];
} else {
    echo HIGILIGHT_ERROR." No port provided".NC.PHP_EOL;
    exit(-1);
}

$port = intval($port);

$timeout = 30;

echo PHP_EOL."##############".PHP_EOL.PHP_EOL."TESTING ".HIGILIGHT2.$host.':'.$port.NC.PHP_EOL;

//check if connection established via is_resource
$sk = @fsockopen($host, $port, $errnum, $errstr, $timeout);
if (!is_resource($sk)) {
    echo ERROR."connection fail: ".HIGILIGHT_ERROR. $errnum . " " . $errstr.NC.PHP_EOL;
    exit(1);
} else {
    echo OK."Connected".NC.PHP_EOL;
    exit(0);
}
EOM
)

echo "$SCRIPT" | php -d xdebug.mode=off $@
exit $?

But once I execute it:

bash check_connect 172.162.5.3:3306

I get:

Could not open input file: 172.162.5.3:3306

How I could also use pipe and command line arguments in my script?

but why would you ever do this? You can just use the #!/usr/bin/env php shebang line instead of using bash, and then don't write any bash code but just plain PHP — Marcus Müller
– Marcus Müller, Commented Jan 24 at 17:12
I want the php script to run with xdebug disabled regardless if I have it enabled. This is part of a DockerImage I use for php app development and I do not want the script to be affected from xdebug. — Dimitrios Desyllas
– Dimitrios Desyllas, Commented Jan 24 at 17:21
Also using netcat does not offer nice UX because this is part of a php application dev harness and the package name for netcat may differ depending the image I use as php execution environment. Using a common script compartible with php 5.x and onwards does offer me a unique way of installing and checking the connectivity for any network address. — Dimitrios Desyllas
– Dimitrios Desyllas, Commented Jan 24 at 17:25
so, #!/usr/bin/env -S php -d xdebug.mode=off would do exactly that. I'm not sure what this has to do with netcat? — Marcus Müller
– Marcus Müller, Commented Jan 24 at 18:37

Stephen Harris · Accepted Answer · 2025-01-24 16:52:13Z

1

You can run php -- arguments

e.g.

#!/bin/sh

S='<?php
printf("You entered %s\n",$argv[1]);
?>'

echo $S | php -- hello

will return the output

You entered hello

answered Jan 24 at 16:52

Stephen Harris

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