<?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));
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]
)
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] => [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]
)