是否有使用 PHP 代码嗅探器强制执行严格比较 (===) 的规则？

Question

As title says. I am looking for a rule similar to eslint's eqeqeq , but for PHP. I would want to enforce the use of === / !== instead of == / != .

I have tried googling and searched through their repo as well, but unfortunately to no avail. Just wanna ask here if someone knows of a rule that I have missed before I open an issue on Github :)

Answer 1

Try including the Squiz.Operators.ComparisonOperatorUsage sniff. It enforces strict type comparisons, including banning the use of !$foo in favour of === false .

It also bans implicit true comparisons, so you can't do something like if ($foo) , but you can disable that by excluding the Squiz.Operators.ComparisonOperatorUsage.ImplicitTrue error code if that it too strict for your standard.

Answer 2

The Slevomat Coding Standard contains a rule specifically for disallowing loose comparison operators.

Install

Install the coding standard globally through Composer or locally to your project directory.

composer global require slevomat\\coding-standard

composer require slevomat\\coding-standard --dev

Reference

phpcs is often configured through a phpcs.xml file. Add a reference to the slevomat coding standard inside this file using the config tag.

<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="PHP_CodeSniffer" xsi:noNamespaceSchemaLocation="phpcs.xsd">
    <config name="installed_paths" value="{path}"/>
...
</ruleset>

The {path} value may be an absolute path if installed globally or a relative path if installed in your project.

C:\\Users\\{username}\\AppData\\Roaming\\Composer\\vendor\\slevomat\\coding-standard

vendor\\slevomat\\coding-standard

Configure

This is an example of a configured phpcs.xml file. I've told phpcs to use the PSR2 rules and also use the DisallowEqualOperators rule from the Slevomat Coding Standard.

<ruleset ...>
    <config name="installed_paths" value="vendor\slevomat\coding-standard"/>

    <!-- Add your rules below this line -->

    <!-- Use the PSR2 rules that are included with phpcs. -->
    <rule ref="PSR2">

    <!--
        https://github.com/slevomat/coding-standard#slevomatcodingstandardoperatorsdisallowequaloperators-
        Disallows using loose == and != comparison operators. Use === and !== instead, they are much more secure and predictable.
    -->
    <rule ref="SlevomatCodingStandard.Operators.DisallowEqualOperators"/>
</ruleset>