用正则表达式解析php函数[关闭]

Question

I'm trying to parse a function in php to 3 things: name, arguments and content.

I have a regex that do that good, but the problem is the he can parse only one function. i.e - if i wrote a function he can parse it, but if i wrote a function and a print_r he will mixed up.

The regex is this:

preg_match("/function.+?([a-zA-Z0-9_]+?)[\s]*\((.*?)\)[\s]*\{(.+)\}/is", $code, $functions);

I didn't wrote it, someone helped me becuase i'm suck in regex. Thank you for help.

Best regards, Roy.

Answer 1

I'm not sure i understand your problem, but it seems to be that your regex won't parse multiple functions from the $code variable?

Here is a slightly re-written regexp that can handle multiple functions

$code = 'function myfunc1() { echo "This is myfunc1"; } function myfunc2($arg1 = array(), $arg2) { echo "This is myfunc2"; print_r($arg1); }';

preg_match_all("/function\s*([a-zA-Z0-9_]+)\s*\((.*)\)\s*\{(.*)\}/Uis", $code, $functions);

echo '<pre>';
print_r($functions);
echo '</pre>';

And the output

Array
(
    [0] => Array
        (
            [0] => function myfunc1() { echo "This is myfunc1"; }
            [1] => function myfunc2($arg1 = array(), $arg2) { echo "This is myfunc2"; print_r($arg1); }
        )

    [1] => Array
        (
            [0] => myfunc1
            [1] => myfunc2
        )

    [2] => Array
        (
            [0] => 
            [1] => $arg1 = array(), $arg2
        )

    [3] => Array
        (
            [0] =>  echo "This is myfunc1"; 
            [1] =>  echo "This is myfunc2"; print_r($arg1); 
        )

)

This will however run into problems if your function bodies contain the { } characters. I don't think that can be handled by a single regular expression.