需要从文件夹中排序和打印图像[关闭]

Question

I've a problem I'm trying to create a website where you can upload a pic and after the upload you see the pic that the previous user uploaded. The images are stored in a folder in my domain but I don't know how to sort them by date, actually I use this code but it didn't go very well

<?php
$search_dir = "uploads/".$row['Reference_No'];
$images = glob("$search_dir/*.jpg");
sort($images);
//display first image
if (count($images) > 0) { // at least one image exists
    $img = $images[0];// first image
    echo "<img src='../../$img'  border='0' /> ";
} else {
    shuffle($images);
    echo "<img src='../../$images'  border='0' /> ";        
}

Answer 1

Extract the .jpg's from the target directory, store the last modified timestamp and filename, sort by timestamp then filename (with path removed), sort, then loop again to output the array.

$array=[];
foreach(glob("uploads/{$row['Reference_No']}/*.jpg") as $filename){
    // store modified timestamp and path-free filename
    $array[]=[filemtime($filename),substr($filename,strrpos($filename,'/')+1)];
}
sort($array);  // sort on modified timestamp, then on filename to break any ties
foreach($array as $a){
    echo $a[1],'<br>';  // display the filename
}