Group By Alphabets Using Range in Array Php

Here is a simple example to group array values by alphabet range.

For example
$arr=array(aaa, aab, aac, aad, aae, aba, abb, abc, abd, abe, aca, acb, acc, acd, ace, ada, adb, adc, add, ade, aea, aeb, aec, aed, aee, baa, bab, bac, bad, bae, bba, bbb, bbc, bbd, bbe, bca, bcb, bcc, bcd, bce, bda, bdb, bdc, bdd, bde, bea, beb, bec, bed, bee, caa, cab, cac, cad, cae, cba, cbb, cbc, cbd, cbe, cca, ccb, ccc, ccd, cce, cda, cdb, cdc, cdd, cde, cea, ceb, cec, ced, cee, daa, dab, dac, dad, dae, dba, dbb, dbc, dbd, dbe, dca, dcb, dcc, dcd, dce, dda, ddb, ddc, ddd, dde, dea, deb, dec, ded, dee, eaa, eab, eac, ead, eae, eba, ebb, ebc, ebd, ebe, eca, ecb, ecc, ecd, ece, eda, edb, edc, edd, ede, eea, eeb, eec, eed, eee);

We can group the array values starting with A and B , C and D ,E and F as an array like .

Array
(
    [A-B] => Array
        (
            [0] => aaa
            [1] => aab
            [2] => aac
            [3] => aad
            [4] => aae
            [5] => aba
            [6] => abb
            [7] => abc
            [8] => abd
            [9] => abe
            [10] => aca
            [11] => acb
            [12] => acc
            [13] => acd
            [14] => ace
            [15] => ada
            [16] => adb
            [17] => adc
            [18] => add
            [19] => ade
            [20] => aea
            [21] => aeb
            [22] => aec
            [23] => aed
            [24] => aee
            [25] => baa
            [26] => bab
            [27] => bac
            [28] => bad
            [29] => bae
            [30] => bba
            [31] => bbb
            [32] => bbc
            [33] => bbd
            [34] => bbe
            [35] => bca
            [36] => bcb
            [37] => bcc
            [38] => bcd
            [39] => bce
            [40] => bda
            [41] => bdb
            [42] => bdc
            [43] => bdd
            [44] => bde
            [45] => bea
            [46] => beb
            [47] => bec
            [48] => bed
            [49] => bee
        )

    [C-D] => Array
        (
            [0] => caa
            [1] => cab
            [2] => cac
            [3] => cad
            [4] => cae
            [5] => cba
            [6] => cbb
            [7] => cbc
            [8] => cbd
            [9] => cbe
            [10] => cca
            [11] => ccb
            [12] => ccc
            [13] => ccd
            [14] => cce
            [15] => cda
            [16] => cdb
            [17] => cdc
            [18] => cdd
            [19] => cde
            [20] => cea
            [21] => ceb
            [22] => cec
            [23] => ced
            [24] => cee
            [25] => daa
            [26] => dab
            [27] => dac
            [28] => dad
            [29] => dae
            [30] => dba
            [31] => dbb
            [32] => dbc
            [33] => dbd
            [34] => dbe
            [35] => dca
            [36] => dcb
            [37] => dcc
            [38] => dcd
            [39] => dce
            [40] => dda
            [41] => ddb
            [42] => ddc
            [43] => ddd
            [44] => dde
            [45] => dea
            [46] => deb
            [47] => dec
            [48] => ded
            [49] => dee
        )

    [E-F] => Array
        (
            [0] => eaa
            [1] => eab
            [2] => eac
            [3] => ead
            [4] => eae
            [5] => eba
            [6] => ebb
            [7] => ebc
            [8] => ebd
            [9] => ebe
            [10] => eca
            [11] => ecb
            [12] => ecc
            [13] => ecd
            [14] => ece
            [15] => eda
            [16] => edb
            [17] => edc
            [18] => edd
            [19] => ede
            [20] => eea
            [21] => eeb
            [22] => eec
            [23] => eed
            [24] => eee
        )

)

Use the following Php code

PHP Code

$ranges=array(
    'A-B'=>range('A','B'),
    'C-D'=>range('C','D'),
    'E-F'=>range('E','F')  // you can extend the range  by adding the range( ) function
);
$final=array();
foreach ($arr as $item) {
    $first_letter=strtoupper(substr($item[0],0,1));
    foreach ($ranges as $label => $range) {
        if (in_array($first_letter,$range)) {
            $final[$label][]=$item;
            break;
        }
    }
}
$alpharange = array_keys($ranges);
// output the final array
echo"

".print_r($final,true)."

";