php - 删除图像扩展名，重命名并还原

Question

假设图片被称为:gecko.jpg
我可以先删除“.jpg”并在“gecko”之后添加“-100x100”，然后再将扩展名放回原位，这样它就是“gecko-100x100.jpg”吗？

Answer 1

是的，非常简单地将PHP的字符串函数与 basename() 结合使用

$base = basename($filename, ".jpg");
echo $base . "-100x100" . ".jpg";

或者使用 strrpos() 通过查找最后一个.对任何文件类型进行扩展名定位

// Use strrpos() & substr() to get the file extension
$ext = substr($filename, strrpos($filename, "."));
// Then stitch it together with the new string and file's basename
$newfilename = basename($filename, $ext) . "-100x100" . $ext;

-

// Some examples in action...
$filename = "somefile.jpg";
$ext = substr($filename, strrpos($filename, "."));
$newfilename = basename($filename, $ext) . "-100x100" . $ext;
echo $newfilename;
// outputs somefile-100x100.jpg

// Same thing with a .gif
$filename = "somefile.gif";
// outputs somefile-100x100.gif