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Deprecated 'implode/join' usage

Reports deprecated usage of the implode and join functions.

Locating this inspection


Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | PHP | General

Starting from PHP 7.4, using implode and join with an array as the first argument and a string as the second argument is deprecated.

See Deprecations for PHP 7.4 ( for details.

Inspection options

Here you can find the description of settings available for the Deprecated 'implode/join' usage inspection, and the reference of their default values.

PHP 8.0 Severity

Default setting: Error

Other available settings:

  • Warning

  • Weak Warning

  • Server Problem

  • Grammar Error

  • Typo

  • Consideration

  • Information


By default bundled with

PhpStorm 2024.1, Qodana for PHP 2024.1,

Can be installed with plugin


Last modified: 18 June 2024