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Interactive shell

As of PHP 5.1.0, the CLI SAPI provides an interactive shell using the -a option if PHP is compiled with the --with-readline option. As of PHP 7.1.0 the interactive shell is also available on Windows, if the readline extension is enabled.

Using the interactive shell you are able to type PHP code and have it executed directly.

$ php -a
Interactive shell

php > echo 5+8;
13
php > function addTwo($n)
php > {
php { return $n + 2;
php { }
php > var_dump(addtwo(2));
int(4)
php >

The interactive shell also features tab completion for functions, constants, class names, variables, static method calls and class constants.

php > strp[TAB][TAB]
strpbrk   strpos    strptime  
php > strp

php > strpt[TAB]ime(

php > $fooThisIsAReallyLongVariableName = 42;
php > $foo[TAB]ThisIsAReallyLongVariableName

The interactive shell stores your history which can be accessed using the up and down keys. The history is saved in the ~/.php_history file.

As of PHP 5.4.0, the CLI SAPI provides the php.ini settings cli.pager and cli.prompt. The cli.pager setting allows an external program (such as less) to act as a pager for the output instead of being displayed directly on the screen. The cli.prompt setting makes it possible to change the php > prompt.

In PHP 5.4.0 it was also made possible to set php.ini settings in the interactive shell using a shorthand notation.

php > #cli.prompt=hello world :> 
hello world :>

php > #cli.prompt=`echo date('H:i:s');` php > 
15:49:35 php > echo 'hi';
hi
15:49:43 php > sleep(2);
15:49:45 php >

php > #cli.pager=less
php > phpinfo();
(output displayed in less)
php >

The cli.prompt setting supports a few escape sequences:

Note:

Files included through auto_prepend_file and auto_append_file are parsed in this mode but with some restrictions - e.g. functions have to be defined before called.

Note:

Autoloading is not available if using PHP in CLI interactive mode.