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<?php $re = '/(\((?:[^()]++|(?1))*\))(*SKIP)(*F)|,\h*/'; $strings = [ "Test A, Test B, Test C (data1, data1)", "Test A, Test B, Test C (data1, data1), Test D (data1, data1), Test E (data1, data1(data, data))", "Test A, Test B, Test C (data1, data1), Test D (data1, data1), Test E ((data1, data1))" ]; foreach($strings as $s) { print_r(preg_split($re, $s)); }
Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
Array ( [0] => Test A [1] => Test B [2] => Test C (data1, data1) ) Array ( [0] => Test A [1] => Test B [2] => Test C (data1, data1) [3] => Test D (data1, data1) [4] => Test E (data1, data1(data, data)) ) Array ( [0] => Test A [1] => Test B [2] => Test C (data1, data1) [3] => Test D (data1, data1) [4] => Test E ((data1, data1)) )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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