array query from split string

[DJ_Polymorph]

Hi Guys,

I've done this with Flash ActionScript but my PHP is nowhere up to that standard, so I've come here! I have a string passed from an input field that's split at every character and pushed into a new array. I'd like to then query this new array against another and get a return of its key.

My AS consists of

    for (var i = 0; i<input.length; i++) {
        for (var j = 0; j<letters.length; j++) {
            if (input[i] == letters[j]) {
                output.push(j);
            }
        }
    }

This basically takes the array "input", compares the values in it to the values in array "letters", and if they're found, pushes the array positions into the new array "output", which is made up of a series of numbers. The iteration continues until 'i' (array length) has been reached.

Hope this makes sense! I can't work out the PHP syntax to get it working...

[DJ_Polymorph]

I just rewrote the for loop using PHP syntax, but I'm not sure about the array_push(); function at the end of it - am I declaring it right?

$output = array();
for ($i = 0; $i<$arrayLength; $i++) {
	for ($j = 0; j<$lettersArrayLength; $j++) {
		if ($chars[i] == $lettersArray[j]) {
			array_push ($output, $j);
		}
	}
}

I just seem to get an infinite loop with the error

Warning: First argument to array_push() needs to be an array in c:\www\myPHP.php on line 31

any ideas?

cheers.

[evo4ever]

if ($chars[$i] == $lettersArray[$j]) { // always remember to declare your variables with a dollar sign ($) in PHP
            array_push ($output, $j);
}

Do this:

$i<sizeof($output);

...instead of this:

$i<$arrayLength

[DJ_Polymorph]

thanks for the reply! I've tried out the code and modified it slightly, but I'm still getting errors:

<?
$input = "this is my string";
$lettersArray = array ("1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "@", ".", ":", "_", "-");
//
//
$chars = preg_split('//', $input, -1, PREG_SPLIT_NO_EMPTY);
//
//
$output = array();
for ($i = 0; $i<=sizeof($chars); $i++) {
	for ($j = 0; j <= sizeof($lettersArray); $j++) {
		if ($chars[$i] == $lettersArray[$j]) {
			array_push ($output, $j);
		}

}
}
//
//
print sizeof($output);
?>

there must be something blindingly obvious wrong here, but it's late and I can't see it. Why won't var j get pushed into array "output"? cheers again...

[evo4ever]

Replace this:

print sizeof($output);

...with this:

foreach($output as $tmp)
{
   print $tmp; /* OR... */ print $tmp."<br>"; // if u want breaks after each value.
}

If that doesnt work tell me the error your getting. oh and u missed out the $ your second j variable on line 11.

[DJ_Polymorph]

Many thanks evo4ever, I'd have been staring at that line for hours before I'd noticed the missing $! I'm flitting between code so these things happen I guess... that's my excuse 😃

Cheers!

[evo4ever]

Yeah I TOTALLY agree with you! I know Java, JSP and PHP and i make similar mistakes to you heh.

PS: I guess thats the downside to knowing more than one language.