rfc:remove_php4_constructors

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rfc:remove_php4_constructors [2015/02/06 16:55]
levim Update implementation 		rfc:remove_php4_constructors [2015/02/23 04:25]
levim Add comments in certain example
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 ===== Proposal ===== ===== Proposal =====
-This RFC proposes that for PHP 7 we emit ''E_DEPRECATED'' whenever a PHP 4 constructor is recognized. These are recognized when the method name matches the class name, the class is not in a namespace, and a PHP 5 constructor (''<nowiki>__construct</nowiki>'') is not present. This RFC proposes that in PHP 8 these will become normal methods and the ''E_DEPRECATED'' will be removed.+PHP 7 will emit ''E_DEPRECATED'' whenever a PHP 4 constructor is defined. When the method name matches the class name, the class is not in a namespace, and a PHP 5 constructor (''<nowiki>__construct</nowiki>'') is not present then an ''E_DEPRECATED'' will be emitted. PHP 8 will stop emitting ''E_DEPRECATED'' and the methods will not be recognized as constructors.
  
-This RFC also proposes to stop emitting ''E_STRICT'' when a method with the same name as the class is present as well as ''<nowiki>__construct</nowiki>''.+PHP 7 will also stop emitting ''E_STRICT'' when a method with the same name as the class is present as well as ''<nowiki>__construct</nowiki>''.
  
-Some code samples in the [[#examples|Examples]] section show how code is impacted.+Refer to the [[#examples|Examples]] section to see how code is impacted.
  
 ==== Backward Incompatible Changes ==== ==== Backward Incompatible Changes ====
 Since an ''E_DEPRECATED'' will be emitted in PHP 7 there may be some backwards compatibility breaks when people use custom error handlers. Since an ''E_DEPRECATED'' will be emitted in PHP 7 there may be some backwards compatibility breaks when people use custom error handlers.
  
-In PHP 8 recognition for old constructors will be outright removed, meaning that anything without a ''<nowiki>__construct</nowiki>'' will not work. The fix is to rename the constructor to ''<nowiki>__construct</nowiki>''.+In PHP 8 recognition for old constructors will be outright removed, meaning that anything without a ''<nowiki>__construct</nowiki>'' will not work the same way it used to. The old-style constructor will be considered a normal method and will not be called when the object is constructed. The fix is to rename the constructor to ''<nowiki>__construct</nowiki>''.
  
 ==== Examples ==== ==== Examples ====
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 <PHP> <PHP>
-class Filter { +class Filter { 
 +    // PHP 5: filter is a constructor 
 +    // PHP 7: filter is a constructor and E_DEPRECATED is raised 
 +    // PHP 8: filter is a normal method and is not a constructor; no E_DEPRECATED is raised
     function filter() {}     function filter() {}
 } }
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 ===== Voting ===== ===== Voting =====
-This RFC targets PHP 7 and PHP 8. Please read the RFC to understand what is being proposed. Also note that anything proposed for PHP 8 would be subject to any future RFC as per our normal processes.+This RFC targets PHP 7 and PHP 8. Please read the RFC to understand what is being proposed.
  
 This RFC requires 2/3 vote in favor of deprecating and removing PHP 4 style constructors to pass. This RFC requires 2/3 vote in favor of deprecating and removing PHP 4 style constructors to pass.
rfc/remove_php4_constructors.txt · Last modified: 2017/09/22 13:28 (external edit)

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