How to generate unique colors in php

How to generate non-repeating colors in php: 1. Create a PHP sample file; 2. Generate non-repeating colors through the "function randColor($num){...}" method.

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

How does php generate non-repeating colors?

php generates multiple random non-repeating color codes

The code is as follows:

<?php
function randColor($num){
//color value limits 0-16777215;
$prehash=&#39;#&#39;; //using string &#39;#&#39; before the color value;
$rsArr= array();
for($i=0;$i<$num;$i++){
$color=rand(0,16777215);
$rsArr[$i]=$prehash.dechex($color);
}
return $rsArr;
}
print_r(randColor(20));
?>

Just put the function that generates random numbers into the loop.

Recommended learning: "PHP Video Tutorial"

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