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How to generate random hex color in PHP
Snippet
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First version:
<?php
$rand = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');
$color = '#'.$rand[mt_rand(0,15)].$rand[mt_rand(0,15)].$rand[mt_rand(0,15)].$rand[mt_rand(0,15)].$rand[mt_rand(0,15)].$rand[mt_rand(0,15)];
echo $color;
?>
<body style="background: <?=$color;?>;">Then echo out the $color value anywhere you need it. For example:
<body style="background: <?=$color;?>;">Second(short) version:
<?php
printf( "#%06X\n", mt_rand( 0, 0xFFFFFF ));