In what scenarios would a 3-character hexadecimal value need to be converted to a 6-character value in PHP?

A 3-character hexadecimal value may need to be converted to a 6-character value in PHP when working with colors in web development. Some browsers require color codes to be in the 6-character format for proper display. To convert a 3-character hexadecimal value to a 6-character value, you can simply duplicate each character to expand it. 

$hexColor = 'f0c';
$expandedHexColor = str_repeat(substr($hexColor, 0, 1), 2) . str_repeat(substr($hexColor, 1, 1), 2) . str_repeat(substr($hexColor, 2, 1), 2);

echo $expandedHexColor; // Output: 'ff00cc'

Keywords

PHP hexadecimal value conversion padding string manipulation

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