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<?php $a = 'romain@ideveloppement.net, test@test.fr , rr,ez,'; var_dump(array_filter(array_map('trim',explode(',',$a))));
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 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(4) { [0]=> string(25) "romain@ideveloppement.net" [1]=> string(12) "test@test.fr" [2]=> string(2) "rr" [3]=> string(2) "ez" }

preferences:
224.72 ms | 406 KiB | 352 Q