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$number = 123;
$handle = fopen ("data.dat", "w");
fwrite ($handle, pack ("L", $number));
fclose($handle);
$handle = fopen ("data.dat", "rb");
$data = fread ($handle, 4);
$array = unpack ("L*", $data);
print_r($array);
//接上面
$file_path = data.dat;
$content = var_export ($arr);
file_put_contents($file_path, $content, LOCK_EX);
//var_export
$arr = array ('a', 'b', array ("c", "d", "e"));
echo var_export ($arr);
/* :
array (
0 => 'a',
1 => 'b',
2 =>
array (
0 => 'c',
1 => 'd',
2 => 'e',
),
)
*/