[9.x] feature: min_digits and max_digits validation

src/Illuminate/Validation/Concerns/ReplacesAttributes.php

@@ -126,6 +126,20 @@ protected function replaceMin($message, $attribute, $rule, $parameters)
         return str_replace(':min', $parameters[0], $message);
     }
 
+    /**
+     * Replace all place-holders for the min digits rule.
+     *
+     * @param  string  $message
+     * @param  string  $attribute
+     * @param  string  $rule
+     * @param  array<int,string>  $parameters
+     * @return string
+     */
+    protected function replaceMinDigits($message, $attribute, $rule, $parameters)
+    {
+        return str_replace(':min', $parameters[0], $message);
+    }
+
     /**
      * Replace all place-holders for the max rule.
      *
@@ -140,6 +154,20 @@ protected function replaceMax($message, $attribute, $rule, $parameters)
         return str_replace(':max', $parameters[0], $message);
     }
 
+    /**
+     * Replace all place-holders for the max digits rule.
+     *
+     * @param  string  $message
+     * @param  string  $attribute
+     * @param  string  $rule
+     * @param  array<int,string>  $parameters
+     * @return string
+     */
+    protected function replaceMaxDigits($message, $attribute, $rule, $parameters)
+    {
+        return str_replace(':max', $parameters[0], $message);
+    }
+
     /**
      * Replace all place-holders for the multiple_of rule.
      *

src/Illuminate/Validation/Concerns/ValidatesAttributes.php

@@ -1325,6 +1325,23 @@ public function validateMax($attribute, $value, $parameters)
         return $this->getSize($attribute, $value) <= $parameters[0];
     }
 
+    /**
+     * Validate that an attribute has a maximum number of digits.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @param  array<int, int|string>  $parameters
+     * @return bool
+     */
+    public function validateMaxDigits($attribute, $value, $parameters)
+    {
+        $this->requireParameterCount(1, $parameters, 'max');
+
+        $length = strlen((string) $value);
+
+        return ! preg_match('/[^0-9]/', $value) && $length <= $parameters[0];
+    }
+
     /**
      * Validate the guessed extension of a file upload is in a set of file extensions.
      *
@@ -1410,6 +1427,23 @@ public function validateMin($attribute, $value, $parameters)
         return $this->getSize($attribute, $value) >= $parameters[0];
     }
 
+    /**
+     * Validate that an attribute has a minimum number of digits.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @param  array<int, int|string>  $parameters
+     * @return bool
+     */
+    public function validateMinDigits($attribute, $value, $parameters)
+    {
+        $this->requireParameterCount(1, $parameters, 'min');
+
+        $length = strlen((string) $value);
+
+        return ! preg_match('/[^0-9]/', $value) && $length >= $parameters[0];
+    }
+
     /**
      * Validate the value of an attribute is a multiple of a given value.
      *

tests/Validation/ValidationValidatorTest.php

@@ -2360,6 +2360,32 @@ public function testValidateDigits()
 
         $v = new Validator($trans, ['foo' => '+12.3'], ['foo' => 'digits_between:1,6']);
         $this->assertFalse($v->passes());
+
+        $trans = $this->getIlluminateArrayTranslator();
+        $v = new Validator($trans, ['foo' => '12345'], ['foo' => 'min_digits:1']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['foo' => 'bar'], ['foo' => 'min_digits:1']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => '123'], ['foo' => 'min_digits:4']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => '+12.3'], ['foo' => 'min_digits:1']);
+        $this->assertFalse($v->passes());
+
+        $trans = $this->getIlluminateArrayTranslator();
+        $v = new Validator($trans, ['foo' => '12345'], ['foo' => 'max_digits:6']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['foo' => 'bar'], ['foo' => 'max_digits:10']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => '123'], ['foo' => 'max_digits:2']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo' => '+12.3'], ['foo' => 'max_digits:6']);
+        $this->assertFalse($v->passes());
     }
 
     public function testValidateSize()