需要帮助清理PHP脚本

Question

目标：在“$ column4”中获取包含多个日期的数据条目，并为每个日期创建一个包含$ column2，$ column3，$ column4和日期后跟一条评论的新条目。

对于这个例子，我们说：

$column1 is an auto-incrementing primary ID
$column2 = '20141122001';
$column3 = 'something';
$column4 = 'else';
$string = '12/29/2014 2:44PM - working with the lender to remove the mortgage late so we are able to refinance the client.  - Person 1 12/04/2014 2:27PM - file suspended until rapid rescore comes back removing late payment from credit.  - Person 2';

以下示例适用于两个日期，但1-20个日期怎么样？提前谢谢。

<?php 
$host = 'localhost';
$db_user = 'intergl8_james';
$db_pass = 'Interglobalsecure2014';
$db_name = 'intergl8_test';
try {
  $pdo = new PDO('mysql:host='.$host.';dbname='.$db_name.'', $db_user, $db_pass);
  $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
  $stmt = $pdo->prepare('SELECT * FROM test');
  $stmt->execute();

  $result = $stmt->fetchAll();

  if ( count($result) ) { 
    foreach($result as $row) {

            $string = $row[4];
     // $column1 = $row[0]; just the ID, don't need to copy
      $column2 = $row[1];
      $column3 = $row[2];
      $column4 = $row[3];

?>


<?php

echo $string . "<br>";

if(preg_match('/(.*)([0-9]{2}\/[0-9]{2}\/[0-9]{2,4})(.*)/', $string, $matches))
{
 $date = $matches[2];
}

echo $date;

//////////////////////

if (isset($date)) {

$newstring = str_replace($date,"",$string);

if(preg_match('/(.*)([0-9]{2}\/[0-9]{2}\/[0-9]{2,4})(.*)/', $newstring, $matches))
{
 $date2 = $matches[2];
}

}

echo "<br>";

echo $date2;

////////////////

echo "<br>";

$parts = parse_url($string);
$path_parts= explode($date2, $parts[path]);
$user = $path_parts[1];
$user2 = $path_parts[0];
//$user3 = $path_part[2];

echo $date2 . " " . $user . "<br>";
echo $user2 . "<br>";

$newdate = $date2 . " " . $user; 
//echo $user3;
?>

<?php
$db_user = 'intergl8_james';
$db_pass = 'Interglobalsecure2014';
try {
  $pdo = new PDO('mysql:host=localhost;dbname=intergl8_test', $db_user, $db_pass);
  $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

  $stmt = $pdo->prepare('INSERT INTO test2 VALUES(:id,:number,:blah,:cool,:notes)');
  $stmt->execute(array(
    ':id' => '', ':number' => $column2, ':blah' => $column3, ':cool' => $column4, 'notes' => $newdate
  ));

  $stmt->execute(array(
    ':id' => '', ':number' => $column2, ':blah' => $column3, ':cool' => $column4, 'notes' => $user2
  ));

  # Affected Rows?
  echo $stmt->rowCount() ." row(s) inserted."; // 1
} catch(PDOException $e) {
  echo 'Error: ' . $e->getMessage();
  }
?>


<?php      
    }   
  } else {
    echo "No rows returned.";
  }
} catch(PDOException $e) {
    echo 'ERROR: ' . $e->getMessage();
}
?>

更新：

<?php 
$host = 'localhost';
$db_user = '';
$db_pass = '';
$db_name = '';
try {
  $pdo = new PDO('mysql:host='.$host.';dbname='.$db_name.'', $db_user, $db_pass);
  $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
  $stmt = $pdo->prepare('SELECT * FROM test');
  $stmt->execute();

  $result = $stmt->fetchAll();

  if ( count($result) ) { 
    foreach($result as $row) {

            $string = $row[4];
     // $column1 = $row[0]; just the ID, don't need to copy
      $column2 = $row[1];
      $column3 = $row[2];
      $column4 = $row[3];

?>

<?php

preg_match_all('/(.*)([0-9]{2}\/[0-9]{2}\/[0-9]{2,4})(.*)/', $string, $matches, PREG_SET_ORDER);

foreach ($matches as $val) {
    echo "matched: " . $val[0] . "<br>";
   /* echo "part 1: " . $val[1] . "<br>";
    echo "part 2: " . $val[2] . "<br>";
    echo "part 3: " . $val[3] . "<br>";
    echo "part 4: " . $val[4] . "<br><br>"; */

// start crazy shit

$db_user = '';
$db_pass = '';
$db_name = '';
try {
  $pdo = new PDO('mysql:host=localhost;dbname='..'', $db_user, $db_pass);
  $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

  $stmt = $pdo->prepare('INSERT INTO test2 VALUES(:id,:number,:blah,:cool,:notes)');
  $stmt->execute(array(
    ':id' => '', ':number' => $column2, ':blah' => $column3, ':cool' => $column4, 'notes' => $val[0]
  ));

} catch(PDOException $e) {
  echo 'Error: ' . $e->getMessage();
  }

// end crazy shit

}

?>

<?php      
    }   
  } else {
    echo "No rows returned.";
  }
} catch(PDOException $e) {
    echo 'ERROR: ' . $e->getMessage();
}
?>