Explode long string - PHP

Question

I have a long string like: B1C1F4G6H4I7J1J8L5O6P2Q1R6T5U8V1Z5, and i need to explode it on pairs so in this case 1 - B1 2 - C1 and so on...

The reason why i need that is that each pair contains 1 information in database so i have to take each of that pair and make some cycle or something to MySQL search

I was thinking about convert that sting to array like this:

1=> B1
2=> C1
3=> F4

and then foreach that with something like

foreach ($array as $arr)
{
  //and here come database search
}

But maybe i am completly wrong and to say true everything i try finish with ERROR so guys i am up for any advise, if somebody have time to write an example code it will be awesome.

Thanks!

p.s. First of all i was thinking about something like:

$string[0] = substr($string,0,2);
$string[1] = substr($string,2,4);

but string will changing and I never know how long it will be

"but string will changing and I never know how long it will be" --- that's why you need strlen. Then just iterate from 0 up to strlen with + 2 step. — zerkms
– zerkms, Commented Jan 16, 2015 at 8:22

trainoasis · Accepted Answer · 2015-01-16 08:23:20Z

2

You can use str_split()

$str = 'B1C1F4G6H4I7J1J8L5O6P2Q1R6T5U8V1Z5';
$ar = str_split($str,2);
print_r($ar);

Make sure you access the first element with zero index.

answered Jan 16, 2015 at 8:23

trainoasis

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2 Comments

Andurit Over a year ago

Actualy working and looks pretty easy :) Thumb up for that already. Is there a chance you can help me to write how can i PDO SQL statement for each of this pairs?

trainoasis Over a year ago

Glad to help! For PDO/SQL you should post another question, so people can find it separately :)

Fluffeh · Accepted Answer · 2015-01-16 08:22:40Z

2

You can always access a string like an array in itself without having to do anything to it like this:

$string='B1C1F4G6H4I7J1J8L5O6P2Q1R6T5U8V1Z5';
for($i=0;$i<strlen($string)/2;$i++)
{
    $arr[]=$string[$i*2].$string[($i*2)+1];
}

print_r($arr);

answered Jan 16, 2015 at 8:22

Fluffeh

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Comments

markcial · Accepted Answer · 2015-01-16 08:24:07Z

1

Php function str_split might work

>>> $text = 'B1C1F4G6H4I7J1J8L5O6P2Q1R6T5U8V1Z5'
>>> str_split($text, 2)
=> [
       "B1",
       "C1",
       "F4",
       "G6",
       "H4",
       "I7",
       "J1",
       "J8",
       "L5",
       "O6",
       "P2",
       "Q1",
       "R6",
       "T5",
       "U8",
       "V1",
       "Z5"
   ]

answered Jan 16, 2015 at 8:24

markcial

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2 Comments

Andurit Over a year ago

This looks good, so now I just need to foreach mysql command or what you suggest?

markcial Over a year ago

then you will have to traverse the array and do whatever operations you will need, str_split returns the array you will need

zafirov · Accepted Answer · 2015-01-16 08:44:29Z

0

You should use recursion:

$string = "B1C1F4G6H4I7J1J8L5O6P2Q1R6T5U8V1Z5";
$array = recursion($string);

print_r($array);



function recursion ($string, $array = array()){
    if (strlen($string) < 1){
        return $array;
        }else{
            $array[] = substr($string, 0 ,2);
            return recursion(substr($string, 2), $array);
        }

}

answered Jan 16, 2015 at 8:44

zafirov

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