php代码
function delline($file)
{
$fp = fopen($file,"r");
$tmp = tempnam("./","temp0");
$tmp_fp = fopen($tmp,"w");
$i=0;
while(!feof($fp)){
$line = fgets($fp);
if($i!=0){
fputs($tmp_fp,$line);
}
$i++;
}
fclose($fp);
fclose($tmp_fp);
rename($tmp,$file);
}