Arithmetic operation with unsupported operands
Reports arithmetic and bitwise expressions with unsupported operands.
Starting with PHP 8.0, using the arithmetic and bitwise operators +, -, *, /, **, %, <<, >>, &, |, ^, ~, ++, -- when one of the operands is an array, resource, or non-overloaded object will result in a TypeError. The only exception is the array + array merge operation, which remains supported.
See PHP's internal test source for the complete list of operations.
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
PhpArithmeticTypeCheckInspection
You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:
//noinspection PhpArithmeticTypeCheckInspectionnote
Actual comment syntax will depend on the code language you are working with
More detailed instructions as well as other ways and options that you have can be found in the product documentation:
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By default bundled with: | IntelliJ IDEA 2025.2, PhpStorm 2025.2, Qodana for JVM 2025.2, Qodana for PHP 2025.2, |