在PHP中,当你上传文件时,可能会遇到文件名冲突的问题。为了解决这个问题,你可以采取以下几种方法:
uniqid()
函数生成一个唯一的字符串,并将其添加到文件名中。例如:$unique_filename = uniqid() . '_' . $_FILES['file']['name'];
move_uploaded_file($_FILES['file']['tmp_name'], 'uploads/' . $unique_filename);
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["file"]["name"]);
if (file_exists($target_file)) {
// 选择覆盖原文件
move_uploaded_file($_FILES["file"]["tmp_name"], $target_file);
} else {
// 或者重命名新文件
$new_filename = uniqid() . '_' . basename($_FILES["file"]["name"]);
move_uploaded_file($_FILES["file"]["tmp_name"], $target_dir . $new_filename);
}
file_1.txt
、file_2.txt
等),直到找到一个不存在的文件名。例如:$target_dir = "uploads/";
$original_filename = basename($_FILES["file"]["name"]);
$extension = pathinfo($original_filename, PATHINFO_EXTENSION);
$filename_without_extension = pathinfo($original_filename, PATHINFO_FILENAME);
$counter = 1;
$new_filename = $original_filename;
while (file_exists($target_dir . $new_filename)) {
$new_filename = $filename_without_extension . "_" . $counter . "." . $extension;
$counter++;
}
move_uploaded_file($_FILES["file"]["tmp_name"], $target_dir . $new_filename);
这样,你就可以在上传文件时处理文件名冲突,确保文件被正确保存。