Summary of methods for generating random colors in php, summary of php generation_PHP tutorial

A summary of methods to generate random colors in php, a summary of php generation

Method 1:
Randomly generate color values ​​(e.g. FF00FF).

color.php

Copy code The code is as follows:

function random_color(){
mt_srand((double)microtime()*1000000);
$c = '';
While(strlen($c)<6){
           $c .= sprintf("%02X", mt_rand(0, 255));
}
Return $c;
}

Method 2:

Copy code The code is as follows:

function randrgb()
{
$str='0123456789ABCDEF';
$estr='#';
$len=strlen($str);
for($i=1;$i<=6;$i++)
{ 
          $num=rand(0,$len-1);                                                   $estr=$estr.$str[$num];                                                }  
Return $estr;
}

Method 3:

Copy code The code is as follows:

function randColor(){

$colors = array();
for($i = 0;$i<6;$i++){
          $colors[] = dechex(rand(0,15));
}
Return implode('',$colors);
}

How to use it:

Random color: #'.randColor().'';?>

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www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/920970.htmlTechArticleA summary of PHP methods to generate random colors, PHP generation summary method one: Randomly generate color values ​​(such as FF00FF). color. The php copy code is as follows: function random_color(){ mt_srand((doubl...