PHP error guide

Trying to access array offset on value of type int: meaning and fix

warning warning Affects: PHP 8.x Last verified:

Error summary

Preserve the expected array shape or reject scalar input. An integer is used as though it were an array.

What it means

Preserve the expected array shape or reject scalar input. An integer is used as though it were an array.

What the error means

This message means that an integer is used as though it were an array. The exact signature distinguishes trying to access array offset on value of type int from a generic application failure.

Why PHP produces it

The engine or service reports “Trying to access array offset on value of type int” because its required precondition was not met. Preserve the expected array shape or reject scalar input.

PHP version notes

The trying to access array offset on value of type int wording here is based on PHP 8.x; 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: an integer is used as though it were an array
  • The code path assumes the prerequisite for trying to access array offset on value of type int has already been satisfied.
  • For trying to access array offset on value of type int, 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 trying to access array offset on value of type int.

Minimal examples

BAD — reproduces the problem

php 
$result = 42;
echo $result["id"];

FIXED — safer pattern

php 
if (!is_array($result)) { throw new TypeError("Expected result array"); }
echo $result["id"];

Step-by-step diagnosis

  1. Copy the complete “Warning: Trying to access array offset on value of type int” text and retain the first application stack frame.
  2. Reproduce trying to access array offset on value of type int in the same SAPI and environment listed for this page.
  3. Before changing trying to access array offset on value of type int, inspect the preceding value or directive and verify its type, path, version, and permissions.
  4. Apply the narrow correction—preserve the expected array shape or reject scalar input—then repeat the original request once.

Fixes

Correct the failing prerequisite

Preserve the expected array shape or reject scalar input

php 
if (!is_array($result)) { throw new TypeError("Expected result array"); }
echo $result["id"];

Fail explicitly at the boundary

Validate the condition before the operation that emits trying to access array offset on value of type int, and log a safe diagnostic without credentials or full production paths.

Common mistakes when fixing it

  • Suppressing trying to access array offset on value of type int instead of correcting its upstream condition.
  • Testing trying to access array offset on value of type int only with the CLI binary when the failing request runs under FPM or Apache.
  • Changing a global setting for trying to access array offset on value of type int before confirming the site-specific effective configuration.

How to prevent it

  • Add a focused test that exercises the boundary responsible for trying to access array offset on value of type int.
  • Keep runtime versions, extensions, configuration, and deploy artifacts affecting trying to access array offset on value of type int reproducible.
  • Validate external data and service return values before they can trigger trying to access array offset on value of type int.

Web server / environment notes

cli, fpm, linux. The failure occurs where an integer is used as though it were an array

Tags: cli,fpm,linux

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