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How to check if uploaded file is image in php

rated 9 times [  9] [ 0]  / comments: 0 / hits: 2384  / 3 years ago, mon, nov 21, 2016, 10:48:23
How to detect if uploaded file is image or not with php
<?php
//upload.php
if(isset($_POST['query'])) {
 $image_info = @getimagesize($_FILES['image']['tmp_name']);
 if($image_info == false) {
  die('Please upload valid image file.');
 } else {
  echo 'Image file is valid';
 }
} else {
?>
<form action="upload.php" method="post" enctype="multipart/form-data">
<input type="file" name="image">
<input type="submit" name="query" value="Upload" />
</form>
<?php } ?>
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