怎么用preg_replace
$content= "sdfggfhghjkjhkhljkljkljkadhkajdhkagfkhgkhgS?Hghjlfijsflkjaslfll
fgdfhsiodghoifgiosdg p:/6117/civ/civ-issue/6117-mff.dgn gjfdghfgdhd
p:/6117/civ/cov-issue/6117-mff.dgn dfghdhfdgjgfjkgkhjkh........ "
要把$content中的所有绝对路径换成相对路径，如p:/6117/civ/civ-issue/6117-mff.dgn
换为:6117-mff.dgn
我想用preg_replace（）做但没弄出来。
------解决方案--------------------
$content= "sdfggfhghjkjhkhljkljkljkadhkajdhkagfkhgkhgS?Hghjlfijsflkjaslfll
fgdfhsiodghoifgiosdg p:/6117/civ/civ-issue/6117-mff.dgn gjfdghfgdhd
p:/6117/civ/cov-issue/6117-mff.dgn dfghdhfdgjgfjkgkhjkh........ ";
echo preg_replace( "/[a-z]:\/\S+?\//iU ", " ", $content);
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