ช่วยดู code เอาข้อมูลใน array มาเขียนลง text file ค่ะ

<?php


$title ="HATCH
  5
320
330
71
100
AcDbEntity
  8
0
 62
     1
100
AcDbHatch
 10
0.0
 20
0.0
 30
0.0
210
0.0
220
0.0
230
1.0
  2
SOLID
 70
     1
 71
     0
 91
        1
 92
        1
 93
      142
 72";
 
 $title2 ="     1
 10";
 $title3 =" 20";
 $title4 =" 11";
 $title5 =" 21";
 $title6 =" 72";
 
 
$wr = array($title1,$title2,$title3,$title4,$title5,$title6);
			
$fileName = 'test3.txt';
$lineNumber = 2;


$contents = file($fileName);

$new_contents = array();
foreach ($contents as $key => $value) {
  $new_contents[] = $value;
  if ($key == $lineNumber) {
	  
	    for($b=0;$b<=5;$b++){
			$changeTo = $wr[$key[$b]];
			
		}
	  
	  $new_contents[] = $changeTo;
  }
}

file_put_contents($fileName, implode('',$new_contents));
?>