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<?php printf('%.10f', (float) 3215465498795121321); echo "\n"; var_dump(3215465498795121321, (float) 3215465498795121321, (int)((float)3215465498795121321));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
3215465498795121152.0000000000 int(3215465498795121321) float(3.215465498795121E+18) int(3215465498795121152)
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 3215465498795121152.0000000000 int(3215465498795121321) float(3.215465498795121E+18) int(3215465498795121152)
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 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
3215465498795121152.0000000000 int(3215465498795121321) float(3.2154654987951E+18) int(3215465498795121152)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0
3215465498795121000.0000000000 int(3215465498795121321) float(3.2154654987951E+18) int(3215465498795121152)

preferences:
269.27 ms | 402 KiB | 396 Q