PHP拆分多个字符串

Question

I have a text file: 'bookdata' with the following structure:

[e-mail]:1:20.30
[e-mail]:4:5.05
 ...

email : total no. of books : total books read.

My problem is to separate each part of the various strings using an associative array as follows:

 +-----------------------------------------------+
 |                     yahoo.com                 |
 +---------------+------------------+------------+
 | [e-mail] |         1        |     20.30 |

 | [e-mail] |         4        |      5.05 |
 +---------------+------------------+------------+

My approach so far is as follows:

I have a function makeArray() that has the data from the read txt file:

public function makeArray()
{
    $readTxtData = $this->read('bookdata');
    //Get the domain from data....
    $domain = preg_split("~[A-Za-z](.*?)@~", $readTxtData);

    return $domain;
}

The result:

        Array
    (
        [0] => 
        [1] => yahoo.com:7:8.35

        [2] => hotmail.com:4:5.59
)

The array should look like this:

 Array
(
    [yahoo.com]
        (
            [0]
                (
                    [0] => [e-mail]
                    [1] => 7
                    [2] => 8.35
                )

            [1] => Array
                (
                    [0] => [e-mail]
                    [1] => 1
                    [2] => 8.36
                )

            [2] => Array
                (
                    [0] => [e-mail]
                    [1] => 9
                    [2] => 13.42
                )
        ).....

Thanks.

Answer 1

Assuming the fact that you're reading the entire text file data in $readTxtData variable, the solution to your problem would be like this,

public function makeArray(){
    $readTxtData = $this->read('bookdata');

    $lines = explode("
", $readTxtData);
    $result = array();
    foreach($lines as $line){
        $components = explode(":", $line); 
        $domain = explode("@", $components[0]);
        $result[$domain[1]][] = $components;
    }
    return $result;
}

Algorithm:

1. Create an empty array named $result.

   $result = array();
   

2. Loop through each of the lines of text file i.e. $lines using foreach loop and do step 3 to 5.

   foreach($lines as $line){
       ...
   }
   

3. Explode each line i.e. $line to get all three components, such as email, total no. of books and total books read in an array i.e. $components, like this:

   Array
   (
       [0] => [e-mail]
       [1] => 1
       [2] => 20.30
   )
   

   This step is performed by the following statement,

   $components = explode(":", $line);
   

4. Explode $components[0] string to get all domain related components, such as user name and domain name in an array i.e. $domain, like this:

   Array
   (
       [0] => abcd
       [1] => yahoo.com
   )
   

   This step is performed by the following statement,

   $domain = explode("@", $components[0]);
   

5. Now use the domain name i.e. yahoo.com as key in $result array and append $components array to it accordingly.

   $result[$domain[1]][] = $components;
   

6. Finally return the $result array.

   return $result;
   

Here are the necessary references:

• http://php.net/manual/en/control-structures.foreach.php
• http://php.net/manual/en/function.explode.php