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<?php $arr1 = array(2,3,1,4); $arr2 = array(2,5,3,4); $arr3 = array(1,3,4,2,5,6,3); $range1 = range(1,max($arr1)); $range2 = range(1,max($arr2)); $range3 = range(1,max($arr3)); Var_dump(count($range1) == count(array_intersect($arr1, $range1))); Var_dump(count($range2) == count(array_intersect($arr2, $range2))); Var_dump(count($range3) == count(array_intersect($arr3, $range3)));
Output for 5.6.38, 7.0.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
bool(true) bool(false) bool(false)
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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