PHP将字符串分为两部分

Question

I have string. for example

$string = 1234567; 

or

$string = 1976324  

How i can split each second. for example.

[0=>1357, 1=>246];

or

[0=>1734, 1=>962];

Answer 1

You can do this way:

<?php
$string = 1234567; 
$string = (string)$string;
$tmp[0] = "";
$tmp[1] = "";
for($i = 0; $i < strlen($string);$i++)
{
  if($i % 2)
  {
   $tmp[1] .= $string[$i];  
  }
  else
  {
   $tmp[0] .= $string[$i];
  }

}

print_r($tmp);
?>

Answer 2

You could also use a combination of str_split, array_chunk and array_column.
I am not recommending this, rather presenting another, alternate way of processing this that gave me some fun ;)

Note : array_column() requires PHP 5.5+.

Example Code :

php > $string = 1234567;
php > print_r(array_column(array_chunk(str_split($string, 1), 2), 0));
Array
(
    [0] => 1
    [1] => 3
    [2] => 5
    [3] => 7
)
php > print_r(array_column(array_chunk(str_split($string, 1), 2), 1));
Array
(
    [0] => 2
    [1] => 4
    [2] => 6
)

Of course you may also concatenate that into strings:

php > echo implode('', array_column(array_chunk(str_split($string, 1), 2), 1));
246
php > echo implode('', array_column(array_chunk(str_split($string, 1), 2), 0));
1357

Answer 3

You could use this

<?php
$string = '1976324';
$halfPosition = ceil(strlen($string)/2);
var_dump([substr($string, 0, $halfPosition), substr($string, $halfPosition)]);

Answer 4

This function became OBSOLETE in PHP 5.3.0, and was DELETED in PHP 7.0.0. You can use eplode and Add a delimiter in your string

// Example 1
$pizza  = "piece1 piece2 piece3 piece4 piece5 piece6";
$pieces = explode(" ", $pizza);
echo $pieces[0]; // piece1
echo $pieces[1]; // piece2