PHP PDOStatement::execute() Method: Usage and Examples

Runs the prepared SQL with previously bound values or a parameter array.

The objective is to understand the behavior and operational limits, not only the method name.

What It Does

Runs the prepared SQL with previously bound values or a parameter array.

Syntax and Return Value

PDOStatement::execute(Parameter #0 [ <optional> ?array $params = null ]): mixed

The return value and exceptional cases depend on the call described here: Arrays passed to execute represent parameter values, not arbitrary SQL fragments.

Example 1: Basic Use

The statement has a real query and result set; database-specific metadata and statement options may be unsupported.

<?php
$pdo = new PDO('sqlite::memory:', null, null, [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
$pdo->exec('CREATE TABLE products (id INTEGER PRIMARY KEY, name TEXT NOT NULL, price INTEGER NOT NULL, active INTEGER)');
$pdo->exec("INSERT INTO products (id,name,price,active) VALUES (1,'Desk',120,1),(2,'Lamp',35,1),(3,'Chair',85,0)");
$stmt = $pdo->prepare("SELECT name FROM products WHERE id = ?");
$stmt->execute([1]);
echo $stmt->fetchColumn();

Example 2: A Second Scenario

The statement has a real query and result set; database-specific metadata and statement options may be unsupported.

<?php
$pdo = new PDO('sqlite::memory:', null, null, [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
$pdo->exec('CREATE TABLE products (id INTEGER PRIMARY KEY, name TEXT NOT NULL, price INTEGER NOT NULL, active INTEGER)');
$pdo->exec("INSERT INTO products (id,name,price,active) VALUES (1,'Desk',120,1),(2,'Lamp',35,1),(3,'Chair',85,0)");
$stmt = $pdo->prepare("SELECT name FROM products WHERE id = ?");
$stmt->execute([2]);
echo $stmt->fetchColumn();

Example 3: Practical Checks

The statement has a real query and result set; database-specific metadata and statement options may be unsupported.

<?php
$pdo = new PDO('sqlite::memory:', null, null, [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
$pdo->exec('CREATE TABLE products (id INTEGER PRIMARY KEY, name TEXT NOT NULL, price INTEGER NOT NULL, active INTEGER)');
$pdo->exec("INSERT INTO products (id,name,price,active) VALUES (1,'Desk',120,1),(2,'Lamp',35,1),(3,'Chair',85,0)");
$stmt = $pdo->prepare("SELECT name FROM products WHERE id = ?");
$stmt->execute([3]);
echo $stmt->fetchColumn();

Important Behavior and Edge Cases

Arrays passed to execute represent parameter values, not arbitrary SQL fragments.

For production use, also account for error handling, data validation, resource limits and environment-specific driver behavior.

Comparison with Related Approaches

Common Beginner Mistakes

Key Takeaways

• Runs the prepared SQL with previously bound values or a parameter array.
• Arrays passed to execute represent parameter values, not arbitrary SQL fragments.
• prepare creates the statement without executing it.

Choose this API or pattern when its exact semantics match your task, and verify the result against the database driver and runtime used by your application.