Using PHP to insert a HTML tag
Question
I have this HTML tag (body):
<body onload="startTime()" background="src/bg3.png">
and I was trying to change background on refresh so I replaced the HTML tag with this PHP code:
<?php
$id = rand(1, 7);
echo "<body onload=".'"'."startTime()".'"'."background=".'"'."src/bg". $id . ".png".'"'.'>';
?>
which returns:
<body onload="startTime()" background="src/bg5.png">
where the number after bg is a random between 1 and 7.
But the problem is that when I inspect element the body tag is simply:
<body>
Does PHP only allow HTML code insertion if it's being returned by a function?
3 answers
solution1
0 2017-04-24 15:48:37
seems you have some problem with quotes ..
<?php
$id = rand(1, 7);
echo "<body onload='startTime()' background='src/bg". $id . ".png'>";
?>
solution2
0 2017-04-24 15:51:20
Try:
echo "<body onload='startTime()' style='background:url('src/bg{$id}.png')>";
Your sting was hard to follow but I think you messed up the concatenation.
Background is part of a style tag. I made the Id part of string interpolation rather than more concates and putting single quotes in double works.
solution3
0 ACCPTED 2017-04-24 17:13:11
Decided to try using a function again (already tried but didn't work):
function changeBG() {
//generate a random number from min to max
var min = 1, max = 7;
var str1 = "src/bg", str2 = ".png"
var number = Math.floor(Math.random() * max) + min;
var path = str1.concat(number);
path = path.concat(str2);
document.body.background = path;
}
This solved it, thanks to everybody that helped.
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