Post Views: 18 1. Report an error in PHP 7.4: header() expects at least 1 parameter, 0 given. as shown in Figure 1 2. Check the specific code implementation 3. Print the $fields , the result is as follows 4. Add judgment, when $field is equal to name, print $FieldResolvers[$field], is_callable($fieldResolvers[$field]) 5. is_callable — Verify that the value can be…
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