将字符串插入路径

Question

我有这样的字符串

folder1/folder2/folder3/13007805372971.jpg

如何在文件名前添加字符串？我想看起来像这样

folder1/folder2/folder3/sometext_13007805372971.jpg

Answer 1

您可以使用pathinfo函数,该函数用于解析路径.

$s='folder1/folder2/folder3/13007805372971.jpg';
$x='sometext_';
$fos=pathinfo($s);

$s2=$fos['dirname'].DIRECTORY_SEPARATOR.$x.$fos['basename'];

Answer 2

您可以使用SplFileInfo类

$file = new SplFileInfo('folder1/folder2/folder3/13007805372971.jpg');
printf('%s/sometext_%s', $file->getPath(), $file->getBasename());

也可以使用DIRECTORY_SEPARATOR常量而不是将斜杠硬编码到调用中.

现场演示