Online PHP editor | output for YeMpR

Output for 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7: string(17) "пинг-понг" string(17) "пинг-понг"
Output for 4.4.0 - 4.4.9, 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.3: string(9) "---------" string(17) "пинг-понг"
Output for 4.3.11, 5.0.0 - 5.0.4: Warning: preg_replace(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1 in /in/YeMpR on line 5 string(9) "---------" NULL
Output for 4.3.3 - 4.3.10: Warning: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1 in /in/YeMpR on line 5 string(9) "---------" NULL
Output for 4.3.0 - 4.3.2: Warning: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1 in /in/YeMpR on line 5 string(17) "-----------------" NULL