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Insert, Update and Delete Queries

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Return to you Address Book database. Insert a record.

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Recall that this action provides the SQL, better yet it will provided the PHP that writes the SQL.

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Copy the code and put it somewhere for safe keeping

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Saved PHP-SQL code in Notepad

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Mark a record and click the pencil icon to update that record.

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Change some fields and click Go.

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Rats. I didn’t see any SQL Update query to copy.

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Mark a record and click on the Delete button

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Copy the SQL for the DELETE, then decide whether you want to delete this record or not.

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Saved DELETE query

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Start two PHP files, place a form and a table with one row

and two columns on the first page.

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Add a list/menu and a submit button in column 1 and a radio group in column 2.

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Corresponding code.

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Add PHP code for putting names into list/menu.

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Result so far.

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Add a second form and second table with 1 row (to start) and 3 columns

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Corresponding code

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After the row (</tr>) but before end of table (</table>), start

PHP code block. Make array of database filed names.

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Write a foreach loop that iterates over the FieldArray making a table row corresponding to each

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Result so far.

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Add SQL query before foreach loop, edit middle column code.

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Result so far

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Add non-breaking space (&nbsp;) to middle

column

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After non-breaking space was added to middle column

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Add if so no Old data is showing for “Insert” choice

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Problem

• The radio buttons do not hold onto the information about what choice was clicked before.

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The top form’s action is the same page, so it can refer to its own $_POST array. I add some php script in the radio button tags to check the appropriate radio button.

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Add if structure that “remembers” which item from the list was selected

The extra word selected in the option tag will indicate which of the option should be showing.

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Added some code so that textboxes are read only and gray when Delete is the chosen action

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Remembers selected person, remembers selected action, grays out textboxes when delete is selected action.

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Add submit button to bottom form.

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Show old data in textbox (as starting point) when Update is selected action.

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Result showing old data in textbox (as starting point) when Update is selected.

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Insert Hidden Fields (to hold info from top form on bottom form so it can be passed to handler of bottom form)

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Result of hidden fields added

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PHP code to get values from top form onto bottom form

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Handler code to determine action requested on calling page

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