How to break down a string inside array into more arrays PHP

Question

Basically I have an array with several string as values (not associative array). I need to get particular parts of each string and transform it into an array with two values.

Here's the structure of my array:

$data = array(
"A1 -- B1",
"A2 -- B2",
"A3 -- B3",
"A1 -- A2",
"A2 -- A3",
"B2 -- B3",
"B1 -- B3",
);

So I need each of these values to become an array like so:

$data = array(
    array("A1", "B1");
    array("A2", "B2");
    ...
);

I've been thinking about using preg_split to break each string down but couldn't get it to work within an array. Not sure preg_split is the best way to do it, so I'm open to suggestions.

Thanks

user399666 · Accepted Answer · 2013-03-07 11:02:42Z

4

Try:

foreach($data as $k => $c){
    $data[$k] = explode(" -- ", $c);
}

answered Mar 7, 2013 at 11:02

user399666

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Comments

Prasanth Bendra · Accepted Answer · 2013-03-07 11:17:42Z

1

Try this :

$data = array(
"A1 -- B1",
"A2 -- B2",
"A3 -- B3",
"A1 -- A2",
"A2 -- A3",
"B2 -- B3",
"B1 -- B3",
);

$res             = array();
foreach($data as $key=>$val){
   $res[$key]    = explode(" -- ",$val);
}

echo "<pre>";
print_r($res);

output:

Array
(
    [0] => Array
        (
            [0] => A1
            [1] => B1
        )

    [1] => Array
        (
            [0] => A2
            [1] => B2
        )

    [2] => Array
        (
            [0] => A3
            [1] => B3
        )

    [3] => Array
        (
            [0] => A1
            [1] => A2
        )

    [4] => Array
        (
            [0] => A2
            [1] => A3
        )

    [5] => Array
        (
            [0] => B2
            [1] => B3
        )

    [6] => Array
        (
            [0] => B1
            [1] => B3
        )

)

edited Mar 7, 2013 at 11:17

answered Mar 7, 2013 at 11:03

Prasanth Bendra

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3 Comments

user1592648 Over a year ago

Why are you using two loops when you only need one, creating unnecessary temp vars, and using trim() when you don't need to? @Wayne Whitty's answer is the correct way to do it.

user1592648 Over a year ago

Don't look at me. But to answer your question, votes are the community's way of showing which answers are good and which are bad. If you got downvoted it means someone in the community did not think your answer was a good one, possibly for the same reasons I pointed out.

Prasanth Bendra Over a year ago

Ok..I take it in a positive way...I will try to improve the answer :)

Cups · Accepted Answer · 2013-03-07 11:03:32Z

0

$data = array(
"A1 -- B1",
"A2 -- B2",
"A3 -- B3",
"A1 -- A2",
"A2 -- A3",
"B2 -- B3",
"B1 -- B3",
);

$new = array();
foreach($data as $d){
$new[] = split(" -- ", $d);
}

var_dump($new);

Gives:

array
  0 => 
    array
      0 => string 'A1' (length=2)
      1 => string 'B1' (length=2)
  1 => 
    array
      0 => string 'A2' (length=2)
      1 => string 'B2' (length=2)
 ... etc

answered Mar 7, 2013 at 11:03

Cups

6,9063 gold badges29 silver badges30 bronze badges

1 Comment

user1592648 Over a year ago

split() is for when you need a regex, you don't need it for this. You need to just use explode()

Kumar Saurabh Sinha · Accepted Answer · 2013-03-07 11:05:06Z

0

try this:

$newArray = array();
foreach($data as $key=>$value)
{
    $expArray = explode(' -- ', $value);
    $newArray[] = array($expArray[0], $expArray[1]);
}

$newArray

is the final array.

I hope this would help.

answered Mar 7, 2013 at 11:05

Kumar Saurabh Sinha

8708 silver badges23 bronze badges

Comments

Ripa Saha · Accepted Answer · 2013-03-07 11:11:07Z

0

Try:
$result_array=array();

foreach($data as $val){
    $ex = explode(" -- ", $val);
    array_push($result_array,$ex);
}

print_r($result_array);

answered Mar 7, 2013 at 11:11

Ripa Saha

2,5406 gold badges29 silver badges54 bronze badges

Comments

w00 · Accepted Answer · 2013-03-07 11:08:54Z

I'll just join the answers since i had it ready anyway.

I also created a custom foreach loop to iterate through each item in the array, then split that item (if it is a string) into an array.

You could also expend the function i wrote to allow recursion. For example, if not all items in the array are string but if some items are also arrays which contain string, which you want to explode, then a recursion is needed.

But i left that out in this exampe:

http://codepad.viper-7.com/xYjXur

<?php

function splitStringInArrayToArray ( $delimiter = ' -- ', array $array )
{
    foreach ( $array as &$item )
    {
        if ( is_array ( $item ) )
            throw new Exception("oh noes, problem");

        $item = explode ( $delimiter, $item );
    }

    return $array;
}

$data = array(
"A1 -- B1",
"A2 -- B2",
"A3 -- B3",
"A1 -- A2",
"A2 -- A3",
"B2 -- B3",
"B1 -- B3"
);

$new = splitStringInArrayToArray ( ' -- ', $data );

echo '<pre>';
print_r($new);
echo '</pre>';

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