When php corrects this data, it prompts that the user name already exists.

When php modifies the data in this section, it prompts that the user name already exists and there is no problem when adding the data. when the user name already exists, it prompts that the user name already exists when phpjquery data aja php modifies the data in this section.


No problem when adding
When you modify the data, the system prompts "the user name already exists"

Php jquery data ajax

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------ Solution --------------------
Upload the ID of the current modified record

$ SQL = "SELECT * FROM". $ tbName. "WHERE name = '". $ username. "' and id <>". $ id;