我有这个检查文件名的功能。如果存在,则按照这种模式将其递增1:
image.jpg
image1.jpg
image2.jpg
问题出现在第4张图片上,它带有0.jpg
。
以下是相关代码:
...
$filetarget = $this->make_image_filename($directory, $new_filename, $extension);
if(!move_uploaded_file($file['tmp_name'], $filetarget)){
$error[$index] = 'copy';
}
...
private function make_image_filename($directory, $name = '', $extension){
if(empty($name)) $name = 'NULL';
$filetarget = $directory.$name.$extension;
if(file_exists($filetarget)){
$name = $this->increment_filename($name);
return $this->make_image_filename($directory, $name, $extension);
} else {
return $filetarget;
}
}
private function increment_filename($name){
$index = $this->get_filename_index($name);
if(is_numeric($index)){
$pos = strpos($name, $index);
$name = substr($name, 0, $pos);
}
if(is_null($index)){
$index = 0;
}
++$index;
return $name.$index;
}
private function get_filename_index($name){
// CHECK FOR INDEX
$i = 1;
$index = substr($name, -$i);
$last_chars = substr($name, -$i);
while(is_numeric($last_chars)){
++$i;
$last_chars = substr($name, -$i);
if(is_numeric($last_chars)){
$index = $last_chars;
}
}
if(is_numeric($index)){
return $index;
} else {
return NULL;
}
}
我现在正在将我的本地服务器上的代码隔离以运行一些测试。你能否在这个过程中看到任何固有的缺陷?
答案 0 :(得分:1)
这是我用来做同样事情的函数:
function make_unique($full_path) {
$file_name = basename($full_path);
$directory = dirname($full_path).DIRECTORY_SEPARATOR;
$i = 2;
while (file_exists($directory.$file_name)) {
$parts = explode('.', $file_name);
// Remove any numbers in brackets in the file name
$parts[0] = preg_replace('/\(([0-9]*)\)$/', '', $parts[0]);
$parts[0] .= '('.$i.')';
$new_file_name = implode('.', $parts);
if (!file_exists($new_file_name)) {
$file_name = $new_file_name;
}
$i++;
}
return $directory.$file_name;
}
(除了它使文件名像image(1).jpg
image(2).jpg
)
答案 1 :(得分:0)
这个怎么样:
function get_next_file_name($file) {
if (!preg_match('/^(\D+)(\d*)(\.\S+)$/', $file, $match)) {
throw new Exception('bad file name format');
}
return $match[1] . (empty($match[2]) ? 1 : ($match[2] + 1)) . $match[3];
}
echo get_next_file_name('image.jpg'), "\n"; // prints image1.jpg
echo get_next_file_name('image1.jpg'), "\n"; // prints image2.jpg
echo get_next_file_name('image999.jpg'), "\n"; // prints image1000.jpg