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<?php foreach(array("Asia/Chita") as $tz) {echo $tz,"=", (int)in_array($tz, timezone_identifiers_list()), "\n";}
Output for 5.4.33 - 5.4.45, 5.5.17 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.3.4, 8.3.6
Asia/Chita=1
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 Asia/Chita=1
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.32, 5.5.0 - 5.5.16
Asia/Chita=0
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Asia/Chita= Fatal error: Call to undefined function timezone_identifiers_list() in /in/2AMgT on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Asia/Chita= Fatal error: Call to undefined function: timezone_identifiers_list() in /in/2AMgT on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Asia/Chita= Fatal error: Call to undefined function: timezone_identifiers_list() in /in/2AMgT on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Asia/Chita= Fatal error: Call to undefined function: timezone_identifiers_list() in /in/2AMgT on line 2

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