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<?php $string = '[this is block this is also same "block" this is same block another same block] new block! another new block! [this is new block this is also a new block]'; print_r(preg_split('/(\[[^]]+])|\R/', $string, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE));
Output for 5.6.38, 7.0.33, 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Array ( [0] => [this is block this is also same "block" this is same block another same block] [1] => new block! [2] => another new block! [3] => [this is new block this is also a new block] )
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80.76 ms | 1442 KiB | 4 Q