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<?php $gmp = gmp_init(1); var_dump( $gmp, isset($gmp), $gmp ?? null, is_null($gmp), $gmp === null );
Output for 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
object(GMP)#1 (1) { ["num"]=> string(1) "1" } bool(true) object(GMP)#1 (1) { ["num"]=> string(1) "1" } bool(false) bool(false)
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13
Fatal error: Uncaught Error: Call to undefined function gmp_init() in /in/4hKol:2 Stack trace: #0 {main} thrown in /in/4hKol on line 2
Process exited with code 255.

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