PHP数组 - 删除逗号，If else语句

Question

I am relatively new to arrays, and struggling with the amount of information out there to solve my problem succinctly. This is as far as I have progressed.

My code:

<?php 

$imagearrdisplay = ",8,7,22,";

$displayitem = explode(",", $imagearrdisplay);

for($i = 0; $i < count($displayitem); $i++){

echo "
<div class='banner'><img src='/images/transitions/$displayitem[$i].jpg' /></div>
Count: $i = $displayitem[$i] ";

}

?>

It currently returns a result of:

<div class='banner'><img src='/images/transitions/.jpg' /></div>
Count: 0 =  
<div class='banner'><img src='/images/transitions/8.jpg' /></div>
Count: 1 = 8 
<div class='banner'><img src='/images/transitions/7.jpg' /></div>
Count: 2 = 7 
<div class='banner'><img src='/images/transitions/22.jpg' /></div>
Count: 3 = 22 
<div class='banner'><img src='/images/transitions/.jpg' /></div>
Count: 4 =  

What I would like to achieve is the following:

1. To remove the first and last comma within the imagearraydisplay when it explodes so that I do not end up with a blank image at the beginning and end.

2. Randomise the results of the array

3. Perform an if / else function to find the [0] and adjust the first result so that I can use css to style the image accordingly.

To be able to then produce an outcome that looks like:

<div class='firstbanner'><img src='/images/transitions/22.jpg' /></div>
<div class='banner'><img src='/images/transitions/7.jpg' /></div>
<div class='banner'><img src='/images/transitions/8.jpg' /></div

I know it's possible, though struggling through the maze of tutes out there. Any help would be really appreciated.

Answer 1

Try with:

$imagearrdisplay = trim(',8,7,22,', ',');
$displayitem = explode(',', $imagearrdisplay);
shuffle($displayitem);

To check if element is first just do:

if ( $i == 0 ) {}