PHP array search for file type and see if file exist

Question

<?php
$rn = $_GET['rn'];

$file_exts = array("jpg", "jpeg", "png");
$upload_exts = end(explode(".", $rn));

#$images/$rn

if (in_array($upload_exts, $file_exts)) {

  #if (in_array(file_exists($haystack), $needle) {
  if (array_search($upload_exts, $file_exts/*file_exists("c:/xampp\htdocs\php/images/" .*/)) {
     $str_img = str_replace(' ', '_', $rn);
  } else {
     $str_img = 'thumb.png';
  }
}

echo $str_img;
?>

Okay so I have this code, but I can't get the result I'm looking for.
I want to see if a file exist, using array_* and other functions like file_exists.
What my problem is, when I want to add a new file type, I will just type it in the array field, and it will search for it, if an image/file was found, the file name + file type will be printed out e.g google-img.jpg, else it whould print thumb.png.

Zerquix18 · Accepted Answer · 2014-04-27 02:33:05Z

1

Use file_exists with dirname(__ FILE __):

$rn = $_GET['rn'];
$file_exts = array("jpg", "jpeg", "png");
$upload_exts = end(explode(".", $rn));

function exists( $file ) {
$file_exts = array("jpg", "jpeg", "png");
$upload_exts = end(explode(".", $file));
 if( in_array($upload_exts, $file_exts) && file_exists( dirname(__FILE__) . '/' . $file ) )
  return $file;
 foreach($file_exts as $a)
 if( file_exists( dirname(__FILE__) . '/' . $file . '.' . $a) )
  return $file.'.'.$a;
 return false;
 }
 if( exists($_GET['rn']) )
   $str_img = str_replace(" ", "_", exists($_GET['rn']));
 else
   $str_img = 'thumb.png';
echo $str_img;

edited Apr 27, 2014 at 2:33

answered Apr 26, 2014 at 23:26

Zerquix18

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15 Comments

Marcus Schack-Abildskov Over a year ago

Not quite what I meant... If the file exist, the thumb.png will not be printed as it does now. I have an image named 01.jpg, and when I type in 01 in the url, it prints out "Extension is invalid". But what I mean was, if the image does not exist, then the thumb.png will be printed

Zerquix18 Over a year ago

file_Exists just will work if you add the extension, else you have to try with multiple the 3 extensions. I've edited the comment. Does it work now?

moskito-x Over a year ago

your function exists returns true or false or filename ??? $str_img = str_replace(" ", "_", exists($_GET['rn'])); can result in $str_img = str_replace(" ", "_", true); there is no function str_replace with argument true !

Zerquix18 Over a year ago

re-edited, now it returns the filename. It will return the filename if file exists, and will return false if not.

moskito-x Over a year ago

why should the code do that? Then there is an open end. Search for image01.jpg.jpg.jpg etc. What you want to achieve, you want to see whether image01.png or image01.jpeg exists that makes sense. That's why you go through all the file extensions.

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