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<?php $word = "רחוב אלסלבדור 41 דירה 84 ירושלים"; $revd = preg_replace_callback('#([א-ת]+)#', 'rev_first', $word); var_dump($revd);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: preg_replace_callback(): Argument #2 ($callback) must be a valid callback, function "rev_first" not found or invalid function name in /in/AduaR:4 Stack trace: #0 /in/AduaR(4): preg_replace_callback('#([\xD7\x90-\xD7\xAA]+)#', 'rev_first', '\xD7\xA8\xD7\x97\xD7\x95\xD7\x91 \xD7\x90\xD7\x9C\xD7\xA1...') #1 {main} thrown in /in/AduaR on line 4
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: preg_replace_callback(): Requires argument 2, 'rev_first', to be a valid callback in /in/AduaR on line 4 string(55) "רחוב אלסלבדור 41 דירה 84 ירושלים"
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: preg_replace_callback(): requires argument 2, 'rev_first', to be a valid callback in /in/AduaR on line 4 string(55) "רחוב אלסלבדור 41 דירה 84 ירושלים"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
Warning: preg_replace_callback() requires argument 2, 'rev_first', to be a valid callback in /in/AduaR on line 4 string(55) "רחוב אלסלבדור 41 דירה 84 ירושלים"

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