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<?php echo preg_match('/^([\pL\pN\pS-]+\.)[\pL]+$/', 'exämple.org'); echo ' but '; echo preg_match('/^([\pL\pN\pS-]+\.)[\pL]+$/', 'exömple.org');
Output for 5.3.19 - 5.3.29, 5.4.9 - 5.4.45, 5.5.0 - 5.5.35, 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 - 8.2.19, 8.3.0 - 8.3.7
1 but 0
Output for 4.4.9, 5.2.5 - 5.2.17, 5.3.0 - 5.3.18, 5.4.0 - 5.4.8
1 but 1
Output for 4.4.0 - 4.4.8, 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.4
0 but 0
Output for 5.0.0 - 5.0.4
<br /> <b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 4 in <b>/in/0dZCZ</b> on line <b>2</b><br /> but <br /> <b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 4 in <b>/in/0dZCZ</b> on line <b>4</b><br />
Output for 4.3.11
<br /> <b>Warning</b>: preg_match(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 4 in <b>/in/0dZCZ</b> on line <b>2</b><br /> but <br /> <b>Warning</b>: preg_match(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 4 in <b>/in/0dZCZ</b> on line <b>4</b><br />
Output for 4.3.0 - 4.3.10
<br /> <b>Warning</b>: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 4 in <b>/in/0dZCZ</b> on line <b>2</b><br /> but <br /> <b>Warning</b>: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 4 in <b>/in/0dZCZ</b> on line <b>4</b><br />
preferences:
234.77 ms | 402 KiB | 359 Q