PHP error guide

SQLSTATE HY093 invalid parameter number: meaning and fix

error sqlstate Affects: PDO with MySQL/MariaDB; exact server wording varies Last verified:

Error summary

Give every placeholder one matching value and avoid reusing named placeholders portably. PDO execute bindings do not correspond to placeholders in the prepared SQL.

What it means

Give every placeholder one matching value and avoid reusing named placeholders portably. PDO execute bindings do not correspond to placeholders in the prepared SQL.

What the error means

This message means that PDO execute bindings do not correspond to placeholders in the prepared SQL. The exact signature distinguishes sqlstate hy093 invalid parameter number from a generic application failure.

Why PHP produces it

The engine or service reports “SQLSTATE HY093 invalid parameter number” because its required precondition was not met. Give every placeholder one matching value and avoid reusing named placeholders portably.

PHP version notes

The sqlstate hy093 invalid parameter number wording here is based on PDO with MySQL/MariaDB; exact server wording varies; punctuation and exception class names can differ on older branches or vendor builds.

Most common causes

  • The immediate input or configuration reaches the specific condition: PDO execute bindings do not correspond to placeholders in the prepared SQL
  • The code path assumes the prerequisite for sqlstate hy093 invalid parameter number has already been satisfied.
  • For sqlstate hy093 invalid parameter number, development and production differ in version, extension, permissions, paths, or service configuration.
  • An earlier operation returned an unchecked value that is consumed by the line reporting sqlstate hy093 invalid parameter number.

Minimal examples

BAD — reproduces the problem

php 
$stmt = $pdo->prepare("SELECT * FROM users WHERE id=? AND status=?");
$stmt->execute([$id]);

FIXED — safer pattern

php 
$stmt->execute([$id, $status]);

Step-by-step diagnosis

  1. Copy the complete “SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens” text and retain the first application stack frame.
  2. Reproduce sqlstate hy093 invalid parameter number in the same SAPI and environment listed for this page.
  3. Before changing sqlstate hy093 invalid parameter number, inspect the preceding value or directive and verify its type, path, version, and permissions.
  4. Apply the narrow correction—give every placeholder one matching value and avoid reusing named placeholders portably—then repeat the original request once.

Fixes

Correct the failing prerequisite

Give every placeholder one matching value and avoid reusing named placeholders portably

php 
$stmt->execute([$id, $status]);

Fail explicitly at the boundary

Validate the condition before the operation that emits sqlstate hy093 invalid parameter number, and log a safe diagnostic without credentials or full production paths.

Common mistakes when fixing it

  • Suppressing sqlstate hy093 invalid parameter number instead of correcting its upstream condition.
  • Testing sqlstate hy093 invalid parameter number only with the CLI binary when the failing request runs under FPM or Apache.
  • Changing a global setting for sqlstate hy093 invalid parameter number before confirming the site-specific effective configuration.

How to prevent it

  • Add a focused test that exercises the boundary responsible for sqlstate hy093 invalid parameter number.
  • Keep runtime versions, extensions, configuration, and deploy artifacts affecting sqlstate hy093 invalid parameter number reproducible.
  • Validate external data and service return values before they can trigger sqlstate hy093 invalid parameter number.

Web server / environment notes

fpm, cli, docker, linux. The failure occurs where pDO execute bindings do not correspond to placeholders in the prepared SQL

Tags: fpm,cli,docker,linux

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