ArrayArray

PHP
1

hi all

i m having multiple choices of colours with checkbox for each color.

i want to check if chosen color value exists in “array” then echo “checked”;


<input type="checkbox" name="colors[]" id="colors[]" value="red" <? if(in_array('red', $colors)) echo "checked='checked'"; ?> />

This code works fine but at present i have to change the color value in the “in_array” code manually for each color.

so i thought of creating a function which will automatic check for color value existance and then will echo “checked”.
but i am stuck in this below function


$chosencolors=array("red","yellow");
foreach($chosencolors as $colr)
{
	$cl = $colr ." "; // output as red,yellow
	$clr = explode(" ",$cl);
	echo $clr; // output as ArrayArray
	echo $clr[0]; // output as redyellow
}

why is $clr giving output as ArrayArray. Its not splitting with explode.

is there any other way of doing the same task.

vineet

2

What you need is an array with all allowed colors.
Then loop through that array with foreach:


<?php
  $allowedColors = array("red", "yellow");
  foreach ($allowedColors as $allowedColor) {
?>
    <input type="checkbox" name="colors[]" id="colors[]" value="<?php echo $allowedColor; ?>" <?php if(in_array($allowedColor, $colors)) echo "checked='checked'"; ?> />
<?php
  }
?>
3

hi guido

thanks for the solution.

but i would like to know why is in my code “explode function” not splitting text.

Its output result as ArrayArray or redyellow (see the comments)


$chosencolors=array("red","yellow");
foreach($chosencolors as $colr)
{
    $cl = $colr ." "; // output as red,yellow
    $clr = explode(" ",$cl);
    echo $clr; // output as ArrayArray
    echo $clr[0]; // output as redyellow
}

vineet

4

Let’s run through a cycle of your loop to see what it’s doing.


$chosencolors=array("red","yellow"); // Defined array.
foreach($chosencolors as $colr) //$colr = "red"
{
    $cl = $colr ." "; // $cl = "red "
    $clr = explode(" ",$cl); // $clr = array(0 => "red", 1 => "");
    echo $clr; // echoes Array, because $clr is an array, and Array->toString = "Array".
    echo $clr[0]; // echoes "red"
}

Now repeat the loop, except wherever the word “red” is, replace it with yellow.
I think perhaps you’ve misunderstood what [FPHP]foreach[/FPHP] does.

5

hi starlion

sorry for asking it again


$chosencolors=array("red","yellow");
foreach($chosencolors as $colr)
{
    $cl = $colr ." "; 
    echo $cl; // output as red yellow
}

$cl gives me output as “red yellow”.

But according to you $cl= "red "


$cl = "red "

why

vineet

6

because the code LOOPs.


$chosencolors=array("red","yellow");
foreach($chosencolors as $colr) //Start loop. Get first element of array (red), store it in $colr.
{
    $cl = $colr ." "; 
    echo $cl; // First time through this will echo "red ", second time through it will echo "yellow "
}  //Go back to top of loop, use next value of array for $colr. If there are no more elements in the array, exit loop.
7

thanks starlion for explaining it.

so it means “explode” function will never work with/ inside foreach loop like as i was trying to do.

vineet