PHP development verification code adding interference elements

Add interference elements

Code explanation
//Add points

for($i=0;$i<200;$i++)

Loop out 200 points

$pointcolor = imagecolorallocate($image,rand(50,200),rand(50,200),rand(50,200));

Use imagecolorallocate to create color

Use imagesetpixel to create a single point

//Add line

for($i=0;$i<8;$i++){ $linecolor = imagecolorallocate($image,rand(60,220),rand(60,220),rand(60,220)); imageline($image,rand(1,99),rand(1,29),rand(1,99),rand(1,29),$linecolor); $i=0;$i<8;$i++

Loop 8 times

$linecolor = imagecolorallocate($image,rand(60,220),rand(60,220),rand(60,220));

Create color

Use the imageline built-in function to create a line