Example 1. Binding PHP variables to a prepared statement

The SQL statement in the following example uses two input parameters in the WHERE clause. We call db2_bind_param() to bind two PHP variables to the corresponding SQL parameters. Notice that the PHP variables do not have to be declared or assigned before the call to db2_bind_param(); in the example, $lower_limit is assigned a value before the call to db2_bind_param(), but $upper_limit is assigned a value after the call to db2_bind_param(). The variables must be bound and, for parameters that accept input, must have any value assigned, before calling db2_execute().

The above example will output:

Pook, cat, 3.2
Rickety Ride, goat, 9.7
Peaches, dog, 12.3

Example 2. Calling stored procedures with IN and OUT parameters

The stored procedure match_animal in the following example accepts three different parameters:

1. an input (IN) parameter that accepts the name of the first animal as input

2. an input-output (INOUT) parameter that accepts the name of the second animal as input and returns the string TRUE if an animal in the database matches that name

3. an output (OUT) parameter that returns the sum of the weight of the two identified animals

The above example will output:

Values of bound parameters _before_ CALL:
  1: Peaches 2: Rickety Ride 3: 0

Values of bound parameters _after_ CALL:
  1: Peaches 2: TRUE 3: 22

Results:
  Peaches, dog, 12.3
  Pook, cat, 3.2
  Rickety Ride, goat, 9.7

Example 3. Inserting a binary large object (BLOB) directly from a file

The data for large objects are typically stored in files, such as XML documents or audio files. Rather than reading an entire file into a PHP variable, and then binding that PHP variable into an SQL statement, you can avoid some memory overhead by binding the file directly to the input parameter of your SQL statement. The following example demonstrates how to bind a file directly into a BLOB column.