Fix validation message when there is a parameter with escaped dot "\."

src/Illuminate/Validation/Validator.php

@@ -409,6 +409,19 @@ protected function replacePlaceholderInString(string $value)
         );
     }
 
+    /**
+     * Replace each field parameter dot placeholder with dot.
+     *
+     * @param  string  $value
+     * @return string
+     */
+    protected function replaceDotPlaceholderInParameters(array $parameters)
+    {
+        return array_map(function ($field) {
+            return str_replace($this->dotPlaceholder, '.', $field);
+        }, $parameters);
+    }
+
     /**
      * Add an after validation callback.
      *
@@ -934,6 +947,10 @@ public function addFailure($attribute, $rule, $parameters = [])
             return $this->excludeAttribute($attribute);
         }
 
+        if ($this->dependsOnOtherFields($rule)) {
+            $parameters = $this->replaceDotPlaceholderInParameters($parameters);
+        }
+
         $this->messages->add($attribute, $this->makeReplacements(
             $this->getMessage($attributeWithPlaceholders, $rule), $attribute, $rule, $parameters
         ));

tests/Validation/ValidationValidatorTest.php

@@ -7074,6 +7074,26 @@ public function testPlaceholdersAreReplaced()
         $this->assertArrayHasKey('foo.bar', $v->validated());
     }
 
+    public function testDotPlaceholdersInParametersAreReplacedIn()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_without' => 'The :attribute field is required when :values is not present.'], 'en');
+
+        // Single parameter
+        $v = new Validator($trans, [], [
+            'name' => 'required_without:user\.name',
+        ]);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The name field is required when user.name is not present.', $v->messages()->first());
+
+        // Multiple parameters
+        $v = new Validator($trans, [], [
+            'name' => 'required_without:user\.name,admin\.name',
+        ]);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The name field is required when user.name / admin.name is not present.', $v->messages()->first());
+    }
+
     public function testCoveringEmptyKeys()
     {
         $trans = $this->getIlluminateArrayTranslator();