how to validate an image array in php

<input name= "p_image[]" type="file" id="p_image[]">

i need that user upload atleast one image and if it doesn开发者_StackOverflow't it show error..

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You can check the count of the array, and if it's equal to 0, then throw an error:

<?php

   if(isset($_POST['p_image'])) { 
      if(!(count($_POST['p_image']))) {
          //throw error here...
      }
   } else {
     //throw another error here...
   }
?>

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<?php

   if(!isset($_POST['p_image'])) { 

          //failure messgae

   }
?>