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Test of bcsub()

Example #1 : test success
Example #2 : test success
Example #1
$input = [
  
=> '1.234',
  
=> '5',
]
$expected_output = $test_output
$test_output = [
  
'result' => [
    
'string' => '-3',
  ],
  
'php_version' => '7.1.30 Linux x86_64',
]
Example #2
$input = [
  
=> '1.234',
  
=> '5',
  
=> 4,
]
$expected_output = $test_output
$test_output = [
  
'result' => [
    
'string' => '-3.7660',
  ],
  
'php_version' => '7.1.30 Linux x86_64',
]