PHP tips and tricks

Contents:

• Class Is A Valid Class
• Float Precision
• Store Float As Index
• Case Insensitive Cast
• $this $this
• No Returntype But Still, Only String
• No Unknown For array_merge()
• No Returntype Enforced
• As As As
• No DNF For Catch
• new On Object
• Unfinished Class Doesn’t Compile
• Yield, Not Return By Reference
• class_exists() With Enums
• No Semicolon In Sight
• glob() With Hidden Files
• file_append_contents()
• array_reduce() To Filter And Alter
• $this Is Not Of The Current Class
• Class Constants With Different Types
• No Change To $this
• file_put_contents() With Array Argument
• Get The Generator
• Redefine Native Functions
• A Static Method Cannot Call A Non Static Method
• Before Or After
• Cast Is So Strong
• Roman Loops
• Finally Catches Exception
• Abstract Again
• Always Compatible Variadic
• Yield, Not Return
• try, catch, finally Are All Optional
• null Or Boolean As Array
• Hide Sensitive Parameter
• No Property In Interface
• Uncallable Function
• Easy Wither Call
• Array Is Full
• Const Without Parenthesis
• Cast Are Case Insensitive
• Array And Object Syntax, Not The Same Error
• When Space Matters
• array array = array()
• Cannot Yield And Never
• Class Invasion Both Ways
• Typed By Enum
• Change A Static Variable Outside Its Function
• Scalar Types Are Unqualified
• array_append() And Short Assignation
• Coalesce And Null
• All Classes Aliases
• Mixed And Untyped Are Not Compatible Types
• Abstract Constants
• Cannot Static Static Property
• More Attribute Usage
• Run Any Script In A Phar
• Static Variable Outside A Method
• Enumeration’s Cases Comparisons
• All Static Curly Syntaxes And One Wrong
• No Such Function As Empty
• Strange –> Operator
• Unexpected keys in array
• Recursive Generator
• Documenting Parameters
• Catch Is Optional
• Void Parameter In array_keys()
• Unsetting Properties Surprises
• Multiple Aliases
• Plus Plus Minus Minus
• Constants Can Be Impossible
• Constants Are Mutable
• Quick DTO Or VO Copy
• Stealth Generator
• Quick Serialize
• Clone Clone Clone
• Set readonly Properties Outside The Class
• Exception Polyphormism
• Exponential Minus One
• PHP Infinity Is Reachable
• Negative Squares
• Negating An Assignation
• Numeric Separators Inside A String?
• Identifier Confusions
• Relaxed Syntax With Const
• Closure To Call
• Get $this In A Static
• array_intersect_uassoc_insensitive() ?
• Class And Constant Confusion
• Don’t Forget To Yield
• Inconsistent Constructor Signatures
• foreach() With All The Same Keys
• Battle Of Definition
• Variadic All The Yields
• Refactoring strpos()
• is_a() Versus Instanceof
• Exporting Properties
• Another Cast To Int
• ReturnTypeWillChange Is For All
• URL As Comments
• Coalesce And Assignation
• Missing Methods Are Fatal
• Only Initialize With Short Assignation Coalesce
• Keys Are Integers Whenever Possible
• Fast Creation Of stdClass Objects
• An Elephpant In The Code
• Internal Static Call
• strict_types Exceptions
• Playing With Integers Limits
• Signature Compatibility Exception
• Object Is Not A Type
• Forgotten Throw
• Keywords In Namespaces
• No Warning For Unused Variables
• Self In An Interface
• instanceof Object
• stdClass Object
• A Case Of Misplaced Parenthesis
• Checking For Names At Different Times
• Integer Becomes Negative
• Not All Strings In Arrays
• Recursive Arrow Function
• null Does Not Always Equal false
• Recursive Closure
• Cast Precedence
• Enum As A Name
• Type Is Not Always Returned
• The Namespace Stack
• Catch On Interfaces