PDOStatement::execute
PDOStatement::execute — Executes a prepared statement (PHP 5 >= 5.1.0, PECL pdo >= 0.1.0)
Description
Syntax
bool PDOStatement::execute ([ array $input_parameters ] )
Executes a prepared statement. If the prepared statement includes parameter markers, you must either:
Call
Or pass an array of input-only parameter values
Parameters
input_parameters
An array with the same number of elements as the number of bound parameters in the SQL statement being executed. All values are treated as PDO::PARAM_STR.
You cannot bind multiple values to a single parameter; for example, you cannot bind two values to a single named parameter in an IN() clause.
The bound values cannot exceed the specified number. If there are more keys in input_parameters than in the SQL statement specified in PDO::prepare(), the statement will fail and an error will be issued.
Return Value
Returns TRUE on success or FALSE on failure.
Examples
Executing a prepared statement with bound variables
<?php
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < :calories AND colour = :colour');
$sth->bindParam(':calories', $calories, PDO::PARAM_INT);
$sth->bindParam(':colour', $colour, PDO::PARAM_STR, 12);
$sth->execute();
?>
Executing a prepared statement with an array of input values (named parameters)
<?php
/* Execute a prepared statement by passing an array of insert values */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < :calories AND colour = :colour');
$sth->execute(array(':calories' => $calories, ':colour' => $colour));
?>
Executing a prepared statement with an array of input values (placeholders)
<?php
/* Execute a prepared statement by passing an array of insert values */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < ? AND colour = ?');
$sth->execute(array($calories, $colour));
?>
Executing a prepared statement with question mark placeholders
<?php
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < ? AND colour = ?');
$sth->bindParam(1, $calories, PDO::PARAM_INT);
$sth->bindParam(2, $colour, PDO::PARAM_STR, 12);
$sth->execute();
?>
Executing a prepared statement with an IN clause using an array
<?php
/* Execute a prepared statement with an IN clause using an array of values */
$params = array(1, 21, 63, 171);
/* Create a string filled with placeholders with the same number as params */
$place_holders = implode(',', array_fill(0, count($params), '?'));
/*
For each value in the $params array, the prepared statement contains enough unnamed placeholders.
When the statement is executed, the values in the $params array are bound to the placeholders in the prepared statement.
This is different from using PDOStatement::bindParam() because it requires a reference variable. PDOStatement::execute() serves as an alternative for binding by value.
$sth = $dbh->prepare("SELECT id, name FROM contacts WHERE id IN ($place_holders)");
$sth->execute($params);
?>