PHP variable naming should follow the principles of clear and accurate to improve code readability and maintenance efficiency. 1. Use descriptive vocabulary instead of abbreviation, such as $user instead of $u; 2. Add state word prefixes to Boolean values, such as $isvisible, $hasPermission; 3. Use plural forms for arrays and sets, such as $users and $orders; 4. Avoid fuzzy words and choose vocabulary that specifically expresses the actual content, such as $userData instead of $data.
Naming PHP variables seems simple, but it is actually quite a test of experience to be clear, accurate and without repetition. Variable names directly affect code readability and post-maintenance efficiency, especially when multiple people collaborate, a good name can save a lot of communication costs.
Replace abbreviation with descriptive vocabulary
Many people are accustomed to using short variable names such as $val
, $temp
, and $i
, but in actual development, unless it is a scenario with very clear loops or temporary uses, try to use more specific names as much as possible. for example:
- ?
$u
→ ?$user
- ?
$d
→ ?$data
- ?
$tmp
→ ?$temporaryData
This not only makes it clear when you see it yourself, but it is also easier for others to understand the intention when they take over the code. Especially when dealing with complex logic, you can see the purpose of variables at a glance, saving a lot of time to "guess meaning".
Boolean plus status word prefix
Boolean variables usually represent a certain state, such as whether it is enabled, whether it exists, etc. To make it clear at a glance, it is recommended to add prefixes is
, has
, should
, etc.:
-
$isVisible
-
$hasPermission
-
$shouldUpdate
This naming method makes the judgment logic more intuitive. For example:
if ($isVisible) { ... }
Compare
if ($visible) { ... }
It expresses more clearly that this is a state judgment.
Arrays and collections are in plural form
When you store multiple elements, it is best to use plural forms of variable names, so you can tell that it is not a single data at a glance:
-
$users
instead of$user
-
$orders
instead of$order
-
$tags
instead of$tag
This naming method is especially useful when handling loops or batch operations and reduces misunderstandings. for example:
foreach ($users as $user) { ... }
Clear structure and clear semantics.
Avoid vague words and use less common words
Some words seem OK, but their meanings are too broad in different contexts, such as:
- ?
$data
(too wide) - ?
$info
(too much information, don't know what it means) - ?
$result
(maybe it returns an array, object, or boolean?)
It should be named according to the specific purpose, such as:
-
$userData
-
$userInfoArray
-
$searchResult
These names can better express the actual content of the variable and reduce the cost of guessing.
Basically these principles seem simple, but they are easy to ignore when actually writing code. Sticking to naming variables in a clear and accurate way can not only improve the efficiency of writing your own code, but also make it easier for others to understand and maintain your code.
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