Run PHP interactively. For more information, see the Interactive shell section.

Bind Path for external FASTCGI Server mode (CGI only).

Do not chdir to the script's directory (CGI only).

Quiet-mode. Suppress HTTP header output (CGI only).

Measure execution time of script repeated count times (CGI only).

Specifies either a directory in which to look for php.ini, or a custom INI file (which does not need to be named php.ini), e.g.:

$ php -c /custom/directory/ my_script.php

$ php -c /custom/directory/custom-file.ini my_script.php

If this option is not specified, php.ini is searched for in the default locations.

Ignore php.ini completely.

Set a custom value for any of the configuration directives allowed in php.ini. The syntax is:

 -d configuration_directive[=value]
 

# Omitting the value part will set the given configuration directive to "1"
$ php -d max_execution_time
        -r '$foo = ini_get("max_execution_time"); var_dump($foo);'
string(1) "1"

# Passing an empty value part will set the configuration directive to ""
php -d max_execution_time=
        -r '$foo = ini_get("max_execution_time"); var_dump($foo);'
string(0) ""

# The configuration directive will be set to anything passed after the '=' character
$  php -d max_execution_time=20
        -r '$foo = ini_get("max_execution_time"); var_dump($foo);'
string(2) "20"
$  php
        -d max_execution_time=doesntmakesense
        -r '$foo = ini_get("max_execution_time"); var_dump($foo);'
string(15) "doesntmakesense"

Activate the extended information mode, to be used by a debugger/profiler.

Parse and execute the specified file. The -f is optional and may be omitted - providing just the filename to execute is sufficient.

Syntax check but do not execute the given PHP code. The input from standard input will be processed if no filenames are specified, otherwise each filename will be checked. On success, the text No syntax errors detected in <filename> is written to standard output. On failure, the text Errors parsing <filename> is written to standard output in addition to the internal parser error. If any failures are found in the specified files (or standard input), the shell return code is set to -1, otherwise the shell return code is set to 0.

This option won't find fatal errors (like undefined functions) that require executing the code.

Note:

Prior to PHP 8.3.0, it was only possible to specify one filename to be checked.

Note:

This option does not work together with the -r option.

Allows execution of PHP included directly on the command line. The PHP start and end tags (<?php and ?>) are not needed and will cause a parse error if present.

Note:

Care must be taken when using this form of PHP not to collide with command line variable substitution done by the shell.

Example #3 Getting a syntax error when using double quotes

$ php -r "$foo = get_defined_constants();"
PHP Parse error:  syntax error, unexpected '=' in Command line code on line 1

Parse error: syntax error, unexpected '=' in Command line code on line 1

The problem here is that sh/bash performs variable substitution even when using double quotes ". Since the variable $foo is unlikely to be defined, it expands to nothing which results in the code passed to PHP for execution actually reading:

$ php -r " = get_defined_constants();"

The correct way would be to use single quotes '. Variables in single-quoted strings are not expanded by sh/bash.

Example #4 Using single quotes to prevent the shell's variable substitution

$ php -r '$foo = get_defined_constants(); var_dump($foo);'
array(370) {
  ["E_ERROR"]=>
  int(1)
  ["E_WARNING"]=>
  int(2)
  ["E_PARSE"]=>
  int(4)
  ["E_NOTICE"]=>
  int(8)
  ["E_CORE_ERROR"]=>
  [...]

If using a shell other than sh/bash, further issues might be experienced - if appropriate, a bug report should be opened at » https://github.com/php/php-src/issues. It is still easy to run into trouble when trying to use variables (shell or PHP) in command-line code, or using backslashes for escaping, so take great care when doing so. You have been warned!

Note:

-r is available in the CLI SAPI, but not in the CGI SAPI.

Note:

This option is only intended for very basic code, so some configuration directives (such as auto_prepend_file and auto_append_file) are ignored in this mode.

PHP code to execute before processing stdin.

PHP code to execute for every input line.

There are two special variables available in this mode: $argn and $argi. $argn will contain the line PHP is processing at that moment, while $argi will contain the line number.

PHP file to execute for every input line.

PHP code to execute after processing the input.

$ find my_proj | php -B '$l=0;' -R '$l += count(@file($argn));' -E 'echo "Total Lines: $l\n";'
Total Lines: 37328

Starts built-in web server.

Display colour syntax highlighted source.

This option uses the internal mechanism to parse the file and writes an HTML highlighted version of it to standard output. Note that all it does is generate a block of <code> [...] </code> HTML tags, no HTML headers.

Note:

This option does not work together with the -r option.

Display source with comments and whitespace stripped.

Note:

This option does not work together with the -r option.

Load Zend extension. If only a filename is given, PHP tries to load this extension from the current default library path on your system (usually /etc/ld.so.conf on Linux systems, for example). Passing a filename with an absolute path will not use the system's library search path. A relative filename including directory information will tell PHP to try loading the extension relative to the current directory.

Show configuration file names and scanned directories.

$ php --ini
Configuration File (php.ini) Path: /usr/dev/php/5.2/lib
Loaded Configuration File:         /usr/dev/php/5.2/lib/php.ini
Scan for additional .ini files in: (none)
Additional .ini files parsed:      (none)

Show information about the given function or class method (e.g. number and name of the parameters).

This option is only available if PHP was compiled with Reflection support.

$ php --rf var_dump
Function [ <internal> public function var_dump ] {

  - Parameters [2] {
    Parameter #0 [ <required> $var ]
    Parameter #1 [ <optional> $... ]
  }
}

Show information about the given class (list of constants, properties and methods).

This option is only available if PHP was compiled with Reflection support.

$ php --rc Directory
Class [ <internal:standard> class Directory ] {

  - Constants [0] {
  }

  - Static properties [0] {
  }

  - Static methods [0] {
  }

  - Properties [0] {
  }

  - Methods [3] {
    Method [ <internal> public method close ] {
    }

    Method [ <internal> public method rewind ] {
    }

    Method [ <internal> public method read ] {
    }
  }
}

Show information about the given extension (list of php.ini options, defined functions, constants and classes).

This option is only available if PHP was compiled with Reflection support.

$ php --re json
Extension [ <persistent> extension #19 json version 1.2.1 ] {

  - Functions {
    Function [ <internal> function json_encode ] {
    }
    Function [ <internal> function json_decode ] {
    }
  }
}

Show the configuration information for the given Zend extension (the same information that is returned by phpinfo).

Show the configuration information for the given extension (the same information that is returned by phpinfo). The core configuration information is available using "main" as extension name.

$ php --ri date

date

date/time support => enabled
"Olson" Timezone Database Version => 2009.20
Timezone Database => internal
Default timezone => Europe/Oslo

Directive => Local Value => Master Value
date.timezone => Europe/Oslo => Europe/Oslo
date.default_latitude => 59.930972 => 59.930972
date.default_longitude => 10.776699 => 10.776699
date.sunset_zenith => 90.583333 => 90.583333
date.sunrise_zenith => 90.583333 => 90.583333