PHP每100行读取一次

Question

I'm trying to read in a text file of 5000 lines. However I only want to get the first 10 lines of every 100 lines. So line 1-10, line 101 - 110, line 200 - 210 etc. I just cant figure out the logic to use.

$count = count(file($text))

for ($i = 0; $i < $count; $i++) 
 {
 $test = fgets($f_text)
 }

Answer 1

Use % 100 and only print lines where $n % 100 > 0 && $n % 100 <= 10.

$lines = file($text);
foreach ($lines as $n => $line) {
  if ($n % 100 > 0 && $n % 100 <= 10) {
     echo $line; // or whatever
  }
}

A sample of how the logic works:

foreach (range(0,250) as $n => $line) {
  if ($n % 100 >= 1 && $n % 100 <= 10 ) {
    echo $i . "
";
  }
}

1 2 3 4 5 6 7 8 9 10 101 102 103 104 105 106 107 108 109 110 201 202 203 204 205 206 207 208 209 210