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<?php $results = []; foreach ([ '', 'a', ] as $str) { $strx = var_export($str, true); foreach ([ 0, 5, ] as $num) { $results["$strx ?: $num"] = $str ?: $num; $results["$strx ?: $num ?: false"] = $str ?: $num; $results["($strx ?: $num) ?: false"] = $str ?: $num; $results["$strx ?: ($num ?: false)"] = $str ?: $num; $results["$strx ? $num ?: false : false"] = $str ? ($num ?: false) : false; $results["$strx ? $num ?: false : false"] = $str ? $num ?: false : false; } } foreach ($results as $formula => $result) { print var_export($result, true) . ' === ' . $formula . "\n"; }
Output for 7.1.25 - 7.1.32, 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
0 === '' ?: 0 0 === '' ?: 0 ?: false 0 === ('' ?: 0) ?: false 0 === '' ?: (0 ?: false) false === '' ? 0 ?: false : false 5 === '' ?: 5 5 === '' ?: 5 ?: false 5 === ('' ?: 5) ?: false 5 === '' ?: (5 ?: false) false === '' ? 5 ?: false : false 'a' === 'a' ?: 0 'a' === 'a' ?: 0 ?: false 'a' === ('a' ?: 0) ?: false 'a' === 'a' ?: (0 ?: false) false === 'a' ? 0 ?: false : false 'a' === 'a' ?: 5 'a' === 'a' ?: 5 ?: false 'a' === ('a' ?: 5) ?: false 'a' === 'a' ?: (5 ?: false) 5 === 'a' ? 5 ?: false : false
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 0 === '' ?: 0 0 === '' ?: 0 ?: false 0 === ('' ?: 0) ?: false 0 === '' ?: (0 ?: false) false === '' ? 0 ?: false : false 5 === '' ?: 5 5 === '' ?: 5 ?: false 5 === ('' ?: 5) ?: false 5 === '' ?: (5 ?: false) false === '' ? 5 ?: false : false 'a' === 'a' ?: 0 'a' === 'a' ?: 0 ?: false 'a' === ('a' ?: 0) ?: false 'a' === 'a' ?: (0 ?: false) false === 'a' ? 0 ?: false : false 'a' === 'a' ?: 5 'a' === 'a' ?: 5 ?: false 'a' === ('a' ?: 5) ?: false 'a' === 'a' ?: (5 ?: false) 5 === 'a' ? 5 ?: false : false
preferences:
175.05 ms | 403 KiB | 177 Q