PHP : Working with Resultsets

Last class

Open a connection to the MySQL server.Specify the databaseIssue queries (no updates at this stage)Display the results in the table form.Flush memoryClose the connection.

Today’s class

Learn to create database, tables, attributes using mySQL

Embed PHP “type” code with HTML “type” code

Help and kick start your project in your SAD class

Help and kick start your project in this classGood Luck coz you need LOTS OF IT!

Create Table

If you need help on data type definition http://dev.mysql.com/doc/refman/5.0/en/data-types.html

Obtaining the number of columns/attributesIn MySQL you would do the following:

$query = "SELECT * FROM employee";$result = mysql_query($query); // need this to get

resultSETif (mysql_error()) {

die("cannot processed select query");}$num = mysql_num_rows($result); // obtain the number of

rows/rec$numFields = mysql_num_fields($result); //obtain the number

of cols

To obtain the column/attribute names$name = mysql_field_name($result, $i); where $i is the column

number .. going from 0 to ($numFields – 1)

Obtaining the number of columns/attributesObtaining the length of an attribute

$attrLen = mysql_field_len($result, $i); where $i is the column number .. going from 0 to ($numFields – 1)

Obtaining the attribute type$attrType = mysql_field_type($result, $i); where $i is the

column number .. going from 0 to ($numFields – 1)

More function

Obtain the tables within the database$tables = mysql_list_tables("test_alum");

$numTables = mysql_num_rows($tables);

$tableName = mysql_tablename($tables, $k); will give you the table names where $k goes from 0 to ($numTables – 1)

More function – field names

$fields = mysql_list_fields("test_alum", $tableName); // field result

$numfields = mysql_num_fields($fields); //get the number of fields

// Do a for loop here to get the attribute name for index 0 to ($numfields – 1)

for (…. ){

$fieldInfo = mysql_fetch_field($fields);echo $fieldInfo->name;

}

Note: The mysql_fetch_field() command will get you the NEXT attribute property.

Other characteristics

echo $fieldInfo->blob;

echo $fieldInfo->max_length;

echo $fieldInfo->not_null;

echo $fieldInfo->numeric;

echo $fieldInfo->primary_key;

echo $fieldInfo->table;

echo $fieldInfo->type;

echo $fieldInfo->unique_key;

echo $fieldInfo->unsigned;

echo $fieldInfo->zerofill;

echo $fieldInfo->multiple_key;

Exercises jex7.php, jex8.php combine with HTML coding. Use skeleton codejex7.php: You are to show all the tables and

for the test_alum databasejex8.php: You are to show the attributes for

the “users” table. In particular, you have to show the name of attribute; the type of attribute; whether it is numeric (show T is it is numeric

and F if it is not)

Skeleton code

<HTML><HEAD> <TITLE>PHP CODE with HTML commands</TITLE>

</HEAD>

<BODY> <IMG src="mu.gif"> <BR> <BR> <?php

//insert your PHP code inside here ?>

</BODY></HTML>

PHP : Working with Resultsets

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