CallSiteFinderPlugin.php

<?php declare(strict_types=1);

use Phan\CodeBase;
use Phan\Language\Context;
use Phan\PluginV3;
use Phan\PluginV3\AnalyzeFunctionCallCapability;
use Phan\Language\Element\FunctionInterface;

/**
 * Prints out call sites of given functions or methods.
 */
final class CallSiteFinderPlugin extends PluginV3 implements AnalyzeFunctionCallCapability {

    public function getAnalyzeFunctionCallClosures(CodeBase $code_base): array {
        static $function_call_closures = null;
        if ($function_call_closures === null) {
            $function_call_closures = [
                '\\Foo::bar' =>
                    function (CodeBase $code_base, Context $context, FunctionInterface $function) {
                        self::callsiteFinder($code_base, $context, $function, '\\Foo::bar');
                    },
                '\\Baz::bing' =>
                    function (CodeBase $code_base, Context $context, FunctionInterface $function) {
                        self::callsiteFinder($code_base, $context, $function, '\\Baz::bing');
                    },
            ];
        }
        return $function_call_closures;
    }

    private static function callsiteFinder(CodeBase $code_base, Context $context, FunctionInterface $function, string $func_to_analyze): void {
        self::emitIssue(
            $code_base,
            $context,
            'PhanPluginCallsiteFinder',
            'Saw call to {FUNCTION} ({FUNC_TO_ANALYZE})',
            [(string)$function->getFQSEN(), $func_to_analyze]
        );
    }

}

return new CallSiteFinderPlugin();