PHP Security for HEX COLOR CODES

[Monkuar]

I am letting users select there color code option for text-shadow for there username

I am storing them into a field called "color"

 

HEX exaMPLE:

 

FF6633,AA3633

 

First is the background color, 2nd is the foreground. (then i'll explode them)

 

Is there a PHP function that let's me validate the input so it's HEX ONLY?

 

I will be db escaping it and intval it too.

[dragon_sa]

If you only want to use websafe colors can do this

 

<?php
$usercolor=somecolor;
$colors=file(websafe_colors.txt);
  if (in_array($usercolor, $colors) {
   // your color exists
  } else {
    // error not a user color
  }
?>

 

attached is the text fiel of colors

17675_.txt

[Monkuar]

If you only want to use websafe colors can do this

 

<?php
$usercolor=somecolor;
$colors=file(websafe_colors.txt);
foreach ($colors as $color) {
  if ($color==$usercolor) {
    // do something here it is correct
  }
  else {
    // error meassage here not in list
  }
}
?>

 

attached is the text fiel of colors

 

Oh great idea is there a list of more? users can enter any hex amount, I want most most of them work, hmm I dont waant them to be limited.

 

Your idea works great tho, cuz hackers can't do shit if doesn't check against the array lol epic

[dragon_sa]

will look for another list

 

[dragon_sa]

there are 16,777,216 colors to choose from so another option maybe is preg_match

 

$hex_color = "#000111";
if(preg_match('/^#[a-f0-9]{6}$/i', $hex_color)){
echo "The color code is valid";
}else{
echo "Invalid color code";
}

 

I edited the code to check the array above from the list

 

<?php
$usercolor=somecolor;
$colors=file(websafe_colors.txt);
  if (in_array($usercolor, $colors) {
   // your color exists
  } else {
    // error not a user color
  }
?>

 

[Monkuar]

there are 16,777,216 colors to choose from so another option maybe is preg_match

 

$hex_color = "#000111";
if(preg_match('/^#[a-f0-9]{6}$/i', $hex_color)){
echo "The color code is valid";
}else{
echo "Invalid color code";
}

 

I edited the code to check the array above from the list

 

<?php
$usercolor=somecolor;
$colors=file(websafe_colors.txt);
  if (in_array($usercolor, $colors) {
   // your color exists
  } else {
    // error not a user color
  }
?>

 

Beautiful, man

 

Topic Solved

 

Love preg match and regex

[dragon_sa]

almost forgot I also have this which you  might find useful 

17676_.zip

[Monkuar]

almost forgot I also have this which you  might find useful 

Oh ya i use that too! it's so lightweight! check my other topic, i got some more multi array stuff for ya lol