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<?php $array = [ [ 'id' => 1, 'email_id' => 'ok@gmail.com', 'password' => 'test' ], [ 'id' => 2, 'email_id' => 'check@gmail.com', 'password' => 'test' ], [ 'id' => 3, 'email_id' => 'an@gmail.com', 'password' => 'pass' ] ]; var_export( array_values( array_reduce( $array, function($result, $row) { if (!isset($result[$row['password']])) { $result[$row['password']] = $row; } else { if (isset($result[$row['password']]['id'])) { $result[$row['password']] = [$result[$row['password']]]; } $result[$row['password']][] = $row; } return $result; }, [] ) ) );
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
array ( 0 => array ( 0 => array ( 'id' => 1, 'email_id' => 'ok@gmail.com', 'password' => 'test', ), 1 => array ( 'id' => 2, 'email_id' => 'check@gmail.com', 'password' => 'test', ), ), 1 => array ( 'id' => 3, 'email_id' => 'an@gmail.com', 'password' => 'pass', ), )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array ( 0 => array ( 0 => array ( 'id' => 1, 'email_id' => 'ok@gmail.com', 'password' => 'test', ), 1 => array ( 'id' => 2, 'email_id' => 'check@gmail.com', 'password' => 'test', ), ), 1 => array ( 'id' => 3, 'email_id' => 'an@gmail.com', 'password' => 'pass', ), )

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