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i am using this code to save the uploaded file but the problem is it is allowing the file with name with special character and space. for example it is allowing
hi how are you
but i dont want to allow any space ,special charater etc. here is my code .i tried with preg_replace in uri but after that i tried to upload file but nothing got uploaded.
function save_file($file) {
$allowed_ext = array('jpg','png','gif','jpeg');
$ext = $file['name'];
$ext = strtolower($ext);
if (in_array($ext, $allowed_ext)) {
die('Sorry, the file type is incorrect:'.$file['name']);
}
$fname = date("H_i",time()).'_'.get_rand(5);
$dir = date("Ym",time());
$folder = 'uploads/userfiles/'.$dir;
$uri = $folder.'/'.$fname.'.'.$ext;
if (!is_dir($folder))
mkdir($folder, 0777);
if (copy($file['tmp_name'],$uri))
return $uri;
else {
return false;
}
}
419
Use the replace() method to remove all special characters from a string, e.g. str. replace(/[^a-zA-Z0-9 ]/g, ''); .
stripleading() method removes the spaces present at the beginning of the string. striptrailing() method removes the spaces present at the end of the string. replaceall(String regex, String replacement) method replaces all the matched substring with a new string.
Special characters are those characters that are neither a letter nor a number. Whitespace is also not considered a special character.
But by using the ord() function, this function returns the Unicode of a character. This can be used to remove a character from a string.
To strip non letters out of a string you can use the following regular expression
$input = preg_replace("/[^a-zA-Z]+/", "", $input);
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