php file upload: clean name of uploaded file, check for duplicate

File upload: clean name of uploaded file, check for duplicate

$config['upload_path'] = DIR_UPLOAD_BANNER;

$file_parts = pathinfo($_FILES['cms_banner_image']['name']);

//Clean file name, replace all specialcharacters with dahs "-" $file_name = preg_replace('/[^A-Za-z0-9\-]/', '', $file_parts['filename']);

//Replace multiple dash with single $file_name = preg_replace('/-+/', '-', $file_name); $config['file_name'] = $file_name.'.'.$file_parts['extension'];

//Check for duplicate file names $counter = 0;
while (file_exists($config['upload_path'].$config['file_name'])) {
    $counter++;
    $config['file_name'] = $file_name.'_'.
                           $counter.'.'.
                           $file_parts['extension'];
}

Javascript IsInteger

A simple and javascript function to check whether the string is an integer.

function isInteger(s){
var i;
    for (i = 0; i < s.length; i++){
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))){
return false;
}
    }
    // All characters are numbers.
    return true;
}