I have a string: a74b8c0d3845e7… etc etc.
The basic pattern is a letter followed by a number.
I want to create an array that would result in:
Array (
[a] => 74
[b] => 8
[c] => 0
[d] => 3845
[e] => 7
)
I know it'll be a foreach loop (or a couple) but just can't seem to figure it out.
$str = "a74b8c0d3845e7";
$letters = preg_split("/[0-9]+/",$str);
$nums = preg_split("/[a-z]+/", $str);
array_shift($nums);
array_pop($letters);
print_r(array_combine($letters,$nums));
prints out
Array
(
[a] => 74
[b] => 8
[c] => 0
[d] => 3845
[e] => 7
)
Instead of preg_split, you can use preg_match_all to get all the letters and corresponding numbers.
preg_match_all('/([a-z])(\d+)/', $string, $match);
$result = array();
foreach ($match[1] as $i => $letter) {
$result[$letter] = $match[2][$i];
}
You can look into using str_split which would split your string into an array that can be iterated over. Here is an example I just threw together:
// Set the string value.
$string = 'a74b8c0d3845e7';
// Create the string array using `str_split`.
$string_array = str_split($string);
// Init `$final_array`.
$final_array = array();
// Roll throgh the `$string_array` using `foreach`.
foreach ($string_array as $string_key => $string_value) {
// If the value `is_numeric` assign it as `$final_value`.
// Else set the `$final_key` & reset the `$final_value`.
if (is_numeric($string_value)) {
$final_value = $string_value;
}
else {
$final_key = $string_value;
$final_value = '';
}
// Set the value in the `$final_array`.
$final_array[$final_key] .= $final_value;
}
// Dump the `$final_array` to show the concept works.
echo '<pre>';
print_r($final_array);
echo '</pre>';
The output is:
Array
(
[a] => 74
[b] => 8
[c] => 0
[d] => 3845
[e] => 7
)
This should work for you. How it works is it makes 2 arrays. The first array is split by letters, making an array of numbers. Then the next array is split by numbers, making an array of letters. Finally the two arrays are combined into a new array with the letter as its key and a number as its value! Pretty neat...
$string = 'a74b8c0d3845e7';
$array1 = preg_split("/[a-zA-Z]+/", $string);
$array2 = preg_split("/[0-9]+/", $string);
for($i = 1; $i <= count($array1); $i++) {
if(isset($array1[$i])){
$newarray[$array2[$i-1]] = $array1[$i];
}
}
var_dump($newarray);
This should do the trick:
$str = 'a74b8c0d3845e7';
$arr = preg_split('/[a-zA-Z]+/', $str, -1, PREG_SPLIT_NO_EMPTY);
$no_num = preg_replace('/[0-9]/', '', $str);
$new_arr = array();
foreach ($arr as $i=>$a)
$new_arr[$no_num[$i]] = $a;
print_r($new_arr);
Result:
Array
(
[a] => 74
[b] => 8
[c] => 0
[d] => 3845
[e] => 7
)
<?php
$a = "a74b8c0d3845e7";
preg_match_all("/[\d]+/", $a, $numbers);
preg_match_all("/[a-z]+/i", $a, $strings);
$c=array_combine($strings[0],$numbers[0]);
print_r($c);
Check it here.