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<?php $phrases = array("Aaa", "abb", "acc", "bbb", "bb2"); $groups = array(); foreach($phrases as $phrase) { $firstLetter = mb_strtoupper($phrase{0}); $groups[$firstLetter][] = $phrase; } print_r($groups);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Array and string offset access syntax with curly braces is no longer supported in /in/nHDkH on line 7
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Deprecated: Array and string offset access syntax with curly braces is deprecated in /in/nHDkH on line 7 Array ( [A] => Array ( [0] => Aaa [1] => abb [2] => acc ) [B] => Array ( [0] => bbb [1] => bb2 ) )
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Array ( [A] => Array ( [0] => Aaa [1] => abb [2] => acc ) [B] => Array ( [0] => bbb [1] => bb2 ) )

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302.18 ms | 405 KiB | 400 Q