PHP Manual: Executes a prepared statement

Description

public bool PDOStatement::execute ([ array $input_parameters ] )

Execute the prepared statement. If the prepared statement included parameter markers, either:

PDOStatement::bindParam and/or PDOStatement::bindValue has to be called to bind either variables or values (respectively) to the parameter markers. Bound variables pass their value as input and receive the output value, if any, of their associated parameter markers
or an array of input-only parameter values has to be passed

Parameters

input_parameters

An array of values with as many elements as there are bound parameters in the SQL statement being executed. All values are treated as PDO::PARAM_STR.

Multiple values cannot be bound to a single parameter; for example, it is not allowed to bind two values to a single named parameter in an IN() clause.

Binding more values than specified is not possible; if more keys exist in input_parameters than in the SQL specified in the PDO::prepare, then the statement will fail and an error is emitted.

Return Values

Returns TRUE on success or FALSE on failure.

Changelog

Version	Description
5.2.0	The keys from `input_parameters` must match the ones declared in the SQL. Before PHP 5.2.0 this was silently ignored.

Examples

Example #1 Execute a prepared statement with a bound variable and value


<?php
/* Execute a prepared statement by binding a variable and value */
$calories = 150;
$colour = 'gre';
$sth = $dbh->prepare('SELECT name, colour, calories
    FROM fruit
    WHERE calories < :calories AND colour LIKE :colour');
$sth->bindParam(':calories', $calories, PDO::PARAM_INT);
$sth->bindValue(':colour', "%{$colour}%");
$sth->execute();
?>

Example #2 Execute a prepared statement with an array of insert 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));
?>

Example #3 Execute a prepared statement with an array of insert 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));
?>

Example #4 Execute 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();
?>

Example #5 Execute a prepared statement using array for IN clause


<?php
/* Execute a prepared statement using an array of values for an IN clause */
$params = array(1, 21, 63, 171);
/* Create a string for the parameter placeholders filled to the number of params */
$place_holders = implode(',', array_fill(0, count($params), '?'));

/*
    This prepares the statement with enough unnamed placeholders for every value
    in our $params array. The values of the $params array are then bound to the
    placeholders in the prepared statement when the statement is executed.
    This is not the same thing as using PDOStatement::bindParam() since this
    requires a reference to the variable. PDOStatement::execute() only binds
    by value instead.
*/
$sth = $dbh->prepare("SELECT id, name FROM contacts WHERE id IN ($place_holders)");
$sth->execute($params);
?>

Notes

Note:
Some drivers require to close cursor before executing next statement.

PDOStatement::execute