Re: Comparing string to array

Richard Davey wrote:

Hi all, Ok it's 2am, my brain has gone to mush and I am having trouble figuring out an easy way to do this, can anyone shed some light? Take a peek at the following code: // START <pre> <?php

    print_r($_POST);
        $userparam = "test['sam'][]";

    //  How to check if $userparam exists in the $_POST array
    //  and get all the values from it?
        //  Obviously this won't work, but you get the idea:
    if (isset($_POST[$userparam]))
    {
        echo 'yeah';
        $values = $_POST[$userparam];
    }
    else
    {
        echo 'nah';
    }

?> </pre> <form method="post"> <input type="checkbox" name="test['bob'][]" value="red">red<br> <input type="checkbox" name="test['bob'][]" value="green">green<br> <input type="checkbox" name="test['bob'][]" value="blue">blue<br> <input type="checkbox" name="test['sam'][]" value="red2">red2<br> <input type="checkbox" name="test['sam'][]" value="green2">green2<br> <input type="checkbox" name="test['sam'][]" value="blue2">blue2<br>

DON'T USE SINGLE QUOTES IN YOUR NAME="" ATTRIBUTE <input type="checkbox" name="test[bob][red]" value="red">red<br> <input type="checkbox" name="test[bob][green]" value="green">green<br> <input type="checkbox" name="test[bob][blue]" value="blue">blue<br> <input type="checkbox" name="test[sam][red]" value="red">red<br> <input type="checkbox" name="test[sam][green]" value="green">green<br> <input type="checkbox" name="test[sam][blue]" value="blue">blue<br> Now print_r() should show this. Array (

    [test] => Array
        (
            ['bob'] => Array   <-- notice the single quotes??  they are in your actual value
                (
                    [red] => red
                    [green] => green
                    [blue] => blue
                )
            [sam] => Array
                (
                    [red] => red
                    [green] => green
                    [blue] => blue
                )
        )

)

<input type="submit"> </form> // END From the code above I'm trying to figure out how to tell if the $userparam exists in the $_POST array. PHP automatically expands the form element name into multi-dim arrays within $_POST, so a simple 'isset' as shown in the code above won't play because it's got a totally useless array key passed to it. I need a way to turn the string: "test['sam'][]" into something I can look into $_POST for. Any ideas? The coffee boost is wearing off, but I want to get this licked tonight :-\ Cheers, Rich

-- Jim Lucas "Some men are born to greatness, some achieve greatness, and some have greatness thrust upon them." Twelfth Night, Act II, Scene V by William Shakespeare