How to Prevent Delete of Master Record If Child Record Exist in PHP
In this tutorial will see how to prevent delete from a parent/master record if data exist on another or related table. For this example, I have used programme and course table to prevent deletion of data in programme table, if programme name is available on course table. In this case, I have map the one-to-many relationship between programme table and course table.
Here is the DEMO checkout
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