php - Why the getimagesize() function is behaving differently for different parameter[index from $_FILES super-global array] passed? -
i've html form code select image file , upload server.
i have incomplete code written in php until getting size of image user uploading server.
please have @ code snippets below.
html form code :
<!doctype html> <html> <body> <form action="upload.php" method="post" enctype="multipart/form-data"> select image upload: <input type="file" name="filetoupload" id="filetoupload"> <input type="submit" value="upload image" name="submit"> </form> </body> </html> php code 1 :
<?php $target_dir = "c:/xampp/htdocs/php_playground/uploads/"; $target_file = $target_dir . basename($_files["filetoupload"]["name"]); $uploadok = 1; $imagefiletype = pathinfo($target_file,pathinfo_extension); // check if image file actual image or fake image if(isset($_post["submit"])) { $check = getimagesize($_files["filetoupload"]["tmp_name"]); echo "check value tmp_name parameter : \n"; echo "<pre>"; print_r($check); echo "</pre>"; die; } ?> output of php code 1 below :
check value tmp_name parameter : array ( [0] => 1536 [1] => 2048 [2] => 2 [3] => width="1536" height="2048" [bits] => 8 [channels] => 3 [mime] => image/jpeg ) php code 2 :
<?php $target_dir = "c:/xampp/htdocs/php_playground/uploads/"; $target_file = $target_dir . basename($_files["filetoupload"]["name"]); $uploadok = 1; $imagefiletype = pathinfo($target_file,pathinfo_extension); // check if image file actual image or fake image if(isset($_post["submit"])) { $check = getimagesize($_files["filetoupload"]["name"]); echo "check value name parameter : \n"; echo "<pre>"; print_r($check); echo "</pre>"; die; } ?> output of php code 2 below :
warning: getimagesize(demo_image.jpg): failed open stream: no such file or directory in c:\xampp\htdocs\php_playground\uploads\upload.php on line 8
check value name parameter :
now, query i'm trying upload same image in both above programs why i'm getting 2 different outputs getimagesize() function changing index value $_files array?
please guide me in regard.
thanks.
because in second code using "name", function getimagesize not able read file.
here's why:
the "name" variable comes browser, hence on server side function unable locate image , hence fails provide information , generate warning. while "tmp_name" temporary path of server side location, upload file temporarily stored. hence when use "temp_name" function able read file , provide information.
for more information, print $_files varibale see difference between "name" , "tmp_name".
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