random-image.php

<?php
/**
 * Created by Steven Kohlmeyer
 * Date: 10/2/15
 * Time: 11:35 AM
 */


/*
 * This file will randomly pick an image in the folder specified below by $imagesDir, rename it to the new image file name specified by $newImageName.
 *
 * Make sure to not have any image files named similar to the $newImageName as it searches through the files and removes any possibility of using any images similarly named
 */

$imagesDir = 'images/'; // This folder is relatively located to the current file.

$newImageName = "publicImage";  // DO NOT SET A FILE EXTENSION IN THIS VARIABLE!!!


///////////////// DO NOT MODIFY ANYTHING BELOW THIS LINE //////////////////////////

$cwd = getcwd();

$fullImagePath = $cwd . "/" . $imagesDir;

$images = glob($imagesDir . '*.{jpg,jpeg,png,gif}', GLOB_BRACE);


foreach( $images as $key => &$image ) {

    if( false != strpos( $image, $newImageName ) ) {

        unset( $images[ $key ] );

    }

}

$randomImage = $images[array_rand($images)]; // See comments

$ext = pathinfo( $randomImage, PATHINFO_EXTENSION );

var_dump( $randomImage );

$https = isset( $_SERVER['HTTPS'] );

$http = "";

if( $https ) {
    $http = "https://";
} else {
    $http = "http://";
}

$currentFileURL = $http . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];

$currentDirURL = dirname( $currentFileURL );

$url = $currentDirURL . "/" . $imagesDir . $newImageName . "." . $ext;

copy( $cwd . "/" . $randomImage, $fullImagePath . $newImageName . '.' . $ext );