September 2001
Intermediate to advanced
768 pages
32h 45m
English
Content preview from PHP Functions Essential Reference
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CCVS Error Strings
These functions differ from the PHP standard in that they typically return strings indicating status. For instance, ccvs_new() returns the string OK on success. This means that you can’t use normal Boolean tests to check return values; you must compare them against the strings from the following table.
| String | Description |
|---|---|
| OK | The function completed successfully. |
| bad invoice | The attempted operation was not possible for the given invoice. |
| comm error | There was an error in communication. |
| data problem | Internal database failure; for instance, data corruption or a full disk. |
| duplicate invoice | An operation was attempted that would have resulted in an existing invoice being duplicated, or that may only be done once per invoice and has ... |
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