fix: parameter references

Author: xepozz

src/main/kotlin/com/github/xepozz/php_opcodes_language/language/psi/impl/PHPOpParameterBaseImpl.kt

@@ -53,7 +53,7 @@ abstract class PHPOpParameterBaseImpl : PHPOpParameter, PHPOpElementImpl {
         else -> when {
             isPrimitive(this) || isPrimitive(psiElement) -> false
             isSelfReferencable(this) && isSelfReferencable(psiElement) -> true
-            this.isVariable && psiElement.isVariable -> true
+            this.isVariable && psiElement.isVariable && this.text == psiElement.text -> true
             else -> false
         }
     }

src/main/kotlin/com/github/xepozz/php_opcodes_language/reference/PHPOpReferenceContributor.kt

@@ -39,6 +39,7 @@ class PHPOpReferenceContributor : PsiReferenceContributor() {
             PlatformPatterns.or(
                 PlatformPatterns.psiElement(PHPOpVarName::class.java),
                 PlatformPatterns.psiElement(PHPOpLineNumber::class.java),
+                PlatformPatterns.psiElement(PHPOpParameter::class.java),
             ),
             object : PsiReferenceProvider() {
                 override fun getReferencesByElement(