On which event do you want to show alert?
If you tell exact scenario, it will help.
In an insert () before recording a record. check that there is no such record. If so, the dialog box should say "Document already entered."
phpgrid_error("Document already entered.");
phpgrid_msg("Document already entered.");
Dear, the phpgrid_error instruction ("message") works, but pressing F12 in Chrome see that generates a "500 (Internal Server Error)". And phpgrid_msg ("message") instruction, shows no sign.
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