一:$handle = fopen ( 'a.txt' , 'r+' );
rewind($handle);
fwrite($handle,"这是第一行\r\n");
fclose ( $handle );
二:$handle = fopen ( 'a.txt' , 'r+' );
$arr=array();
while($line=fgets($handle)){
$arr[]=$line;
}
fclose ( $handle );
echo end($arr);
rewind($handle);
fwrite($handle,"这是第一行\r\n");
fclose ( $handle );
二:$handle = fopen ( 'a.txt' , 'r+' );
$arr=array();
while($line=fgets($handle)){
$arr[]=$line;
}
fclose ( $handle );
echo end($arr);
$str="这是第一行\r\n";
$handle = fopen ( 'a.txt' , 'r+' );
while($line=fgets($handle)){
$str.=$line;
}
fclose($handle);
file_put_contents('a.txt',$str);