has($key = null)

The has method can be used to determine if messages exist within the MessageBag instance for a given $key. The has method returns true if messages exist for the given $key, and returns false if no messages exist.

The following examples demonstrate the usage of the has method:

 1<?php
 2 
 3use Illuminate\Support\MessageBag;
 4 
 5// Create a new MessageBag instance.
 6$messageBag = new MessageBag;
 7 
 8// false
 9$hasMessage = $messageBag->has('test');
10 
11// Add the message to the message bag.
12$messageBag->add('test', 'Example message');
13 
14// true
15$hasMessage = $messageBag->has('test');

#Continue Reading

This article is the start of a mini-series about Laravel's ErrorMessageBag component. Click through the rest of the articles to continue reading:

• An Introduction to Laravel Message Bags
• Laravel MessageBag Public API: add
• Laravel MessageBag Public API: all
• Laravel MessageBag Public API: any
• Laravel MessageBag Public API: count
• Laravel MessageBag Public API: first
• Laravel MessageBag Public API: get
• Laravel MessageBag Public API: getFormat
• Laravel MessageBag Public API: getMessageBag
• Laravel MessageBag Public API: getMessages
• Laravel MessageBag Public API: has
• Laravel MessageBag Public API: isEmpty
• Laravel MessageBag Public API: jsonSerialize
• Laravel MessageBag Public API: keys
• Laravel MessageBag Public API: merge
• Laravel MessageBag Public API: setFormat
• Laravel MessageBag Public API: toArray
• Laravel MessageBag Public API: toJson
• Laravel MessageBag Public API: __toString

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