mysql_field_name() returns the name of the specified field index. result must be a valid result identifier and field_index is the numerical offset of the field.
Note: field_index starts at 0.
e.g. The index of the third field would actually be 2, the index of the fourth field would be 3 and so on.
Example 1. mysql_field_name() example
The above example would produce the following output:
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For downwards compatibility mysql_fieldname() can also be used. This is deprecated, however.