检查图像文件名是否存在php循环

Question

I have multiple images on my root folder /images/filename.here . Image filenames are like this (email): me@yahoo.jpg , me@yahoo_1.jpg , me@yahoo_2.jpg , you@gmail.jpg .

My code on showing only one image of user if exist me@yahoo.jpg and you@gmail.jpg :

<? 
$email= $data['payment']['email'];
$receipts = "images/".$email;
     if (file_exists($receipts)) { ?>
                <img src="<?=($receipts)?>" width:"100px" height="50px"/>
                <? } else {
                    echo "no receipt";
    } ?>

this only show the "without _x " filename. How can I show other images of a user(eg me@yahoo) using loop _1 , _2 , _3 ... It should display all images that belong to a user.

Answer 1

I would create a helper function get_image to return the path of the image by email and index, and use a while loop to build the list of images:

<?php
function get_image($email, $i) {
    $path = "images/receipts/".$email;
    if ($i > 0) $path .= '_' . $i;
    $path .= '.jpg';
    if (file_exists($path)) return $path;
    return null;
}

$i = 0;
while ($path = get_image($email, $i)) {
    echo "<img src=\"$path\" width:\"100px\" height=\"50px\"/>";
    $i++;
} 

if ($i == 0) {
    echo "no receipt";
}
?>