Passing variables to PHP method

Question

I've a php function ,

func($c) {

global $a,$b;

//Do something

}

I call it like this,

$c = "Test";
func($c);

But in some cases I need to pass an extra parameter $b and it should not be overridden by the global variable value so i tried this,

func($c,$b = $b,$a = $a) {

//Do something

}

But in PHP setting variable as default is not permitted. So kindly help me here ...

I don't get your question? Please elaborate what you wish to do or achieve? — Ghazanfar Mir
– Ghazanfar Mir, Commented Oct 5, 2011 at 9:33
That code you posted is not even valid PHP code.... Besides that, global variables are usually bad. — ThiefMaster
– ThiefMaster, Commented Oct 5, 2011 at 9:35

ThiefMaster · Accepted Answer · 2011-10-05 09:37:19Z

3

So you want to use a global var as the default value of a function argument? You can use the following code assuming null is never passed as a valid argument.

function func($c, $b = null, $a = null) {
    if($b === null) $b = $GLOBALS['b'];
    if($a === null) $a = $GLOBALS['b'];
}

answered Oct 5, 2011 at 9:37

ThiefMaster

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Comments

xkeshav · Accepted Answer · 2011-10-05 09:35:02Z

2

use func_get_args

<?php
function foo()
{
    $numargs = func_num_args();
    echo "Number of arguments: $numargs<br />\n";
    if ($numargs >= 2) {
        echo "Second argument is: " . func_get_arg(1) . "<br />\n";
    }
    $arg_list = func_get_args();
    for ($i = 0; $i < $numargs; $i++) {
        echo "Argument $i is: " . $arg_list[$i] . "<br />\n";
    }
}

foo(1, 2, 3);
?>

answered Oct 5, 2011 at 9:35

xkeshav

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Comments

KodeFor.Me · Accepted Answer · 2011-10-05 09:36:03Z

0

May that will help you.

<?php

    function doWork($options)
    {
        extract(
            merge_array(
                array(
                    'option_1' => default_value,
                    'option_2' => default_value,
                    'option_3' => default_value,
                    'option_x' => default_value
                ),
                $options
            )
        );

        echo $option_1; // Or do what ever you like with option_1
    }

    $opts = array(
        'option_1' => custom_value,
        'option_3' => another_custom_value
    );

answered Oct 5, 2011 at 9:36

KodeFor.Me

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