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Test of gmp_com()

Example #1 : test success
Example #1
$input = '1234'
$expected_output = $test_output
$test_output = [
  
'result' => [
    
'resource' => 'GMP instance',
    
'string' => '-1235',
  ],
  
'php_version' => '7.1.21 Linux x86_64',
]