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Code Inspection: Concatenation with arithmetic usage

Reports the string concatenation expressions that are used together with +, -, <<, and >> operators. Starting with PHP 8, the concatenation operation has lower precedence and such expressions can thus produce unexpected results.

See Concatenation precedence ( for details.

Suppress an inspection in the editor

  1. Place the caret at the highlighted line and press Alt+Enter or click the Intention action icon.

  2. Click the arrow next to the inspection you want to suppress and select the necessary suppress action.

Last modified: 17 April 2024