[英]Detect if string begins by x digits number in php
How can I rename file if it begins by 5
digits?如果文件以5
位数字开头,如何重命名文件?
This is what I tried:这是我尝试过的:
$filename = '156272_abc.png';
$string = PREG_REPLACE("/[^0-9]i5/", '', $filename);
But it doesn't work.但它不起作用。
Could you please point me in the right direction?你能指出我正确的方向吗?
Thanks.谢谢。
I think what you want is this:我想你想要的是这样的:
$filename = '156272_abc.png';
$replacement = preg_replace("/^(\d{5,}).*(\.[^.]+)$/", "$1$2", $filename);
This will match any filename beginning with five or more digits, and replace with just the leading digits, followed by the extension.这将匹配任何以五个或更多数字开头的文件名,并仅替换为前导数字,后跟扩展名。
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