Welcome to PHP Changed Behaviors’s documentation!

Contents:

• Per PHP version
• PHP Changed Behavior
  • Accessing Trait Resources Directly Is Not Allowed
  • Anonymous Class Name Includes Extends
  • array_key_exists() doesn’t work on objects
  • Negative Automatic Index From Empty Array
  • Automatic Index In Non Empty Array
  • Array Usage With String Initialisation
  • array_product() New Checks
  • array_sum() Checks Operands More Thoroughly
  • assert() Throws Exception
  • Backed Enum Values Needed To Compile
  • Bitshift And Concat Precedence
  • Boolean Used As Array
  • Calling Non-Static Method Statically
  • Accessing Directly Properties In Trait
  • Cannot Call Traits Methods Directly
  • Catch Without Variable
  • ceil() Strict Mode
  • class_alias() Works On Internal Classes
  • ::class On Object
  • Can Clone Readonly Properties
  • compact() Throws Notice On Missing Variable
  • Interface Imported Constant Visibility Is Checked
  • Constants In Trait
  • Parameter Contravariance
  • count() Must Count Countable
  • Returntype Covariance
  • cUrl Moved Away From Resource
  • Array Syntax With Curly Braces Are No More
  • datetime With Multiple Signs
  • Die And Exit As Functions
  • Dot And Bitshift Priority
  • Dot And Minus Changed Precedence
  • Dot And Plus Changed Precedence
  • Duplicate Static Definition
  • Dynamic Class Constant
  • No Dynamic Properties By Default
  • E_STRICT Is Deprecated
  • Enforcing Native PHP ReturnType
  • explode() Forbids Empty Strings
  • Cannot Explode() Null
  • file_get_contents() Needs A Real Path
  • FilessytemIterator Skips Dot Files
  • Final Class Constants
  • Final Method In Trait
  • Finfo Moved Away From Resource
  • Float Used As Array
  • get_called_class() Cannot Be Called Outside A Class
  • get_class() Needs An Argument
  • $GLOBALS Assignement
  • Heredoc Syntax In An Array
  • Default Values With htmlspecialchars()
  • Implicit Array Key Conversion
  • Implicit Nullable
  • implode() Arguments Order
  • in_array() String Int Comparisons
  • in_array() Doesn’t Confuse 0 And Empty String
  • Increment On Boolean Is Deprecated
  • Inegality Comparisons
  • Init Readonly Properties In Child
  • instanceof Expect Objects
  • Integer Used As Array
  • Interface Constant Visibility Checks
  • Interpolated String Dereferencing
  • Calling Static Methods On Strings
  • Integer Non-silent Conversion
  • Base Conversion Reports Invalid Characters
  • iterator_count() Also Count Arrays
  • jsonSerialize Must Have Return Type
  • Keywords In Namespace
  • krsort() Places Integers Before Strings In Keys
  • ksort() now uses regular sorting
  • ksort() Now Places Integers Before Strings
  • Duplicate Enum Cases Are Not Linted Anymore
  • Covariance And Contravariance Are Fatal
  • match Is Now A Keyword
  • No Max() On Empty Array
  • max() Must Contain At Least One Element
  • max() On String And Integer
  • No min() On Empty Array
  • min() Doesn’t Accept Empty Arrays
  • mixed Is Now A Keyword
  • Nested Attributes
  • newver Is Now A Keyword
  • New Cases In Switch
  • Call Method On New
  • __sleep() Method Enforces Return Type
  • Non Static Method Called Statically
  • No Reference To $GLOBALS Variable
  • Null Used As Array
  • Old Style Constructors
  • Orphaned Parent
  • $php_errormsg has been removed
  • Plus And Concat Precedence
  • range() Lists Everything Between Strings
  • range() With Int And String
  • (real) Is Replaced By (float)
  • Relative Callable In Strings
  • Relaxed Naming With Class Constant
  • Return Reference On Void
  • PHP native return types are now enforced
  • round() Mode Validation
  • __set_state() Method Must Be Static
  • setlocale() Does Not Affect Echo Anymore
  • sort() Places Integers Before Strings
  • Sorting Closure Must Return Integers
  • Spaces In Namespaces
  • spaceship Operator Results
  • SplFixedArray Is Now An IteratorAggregate
  • static Cannot Be Used Anymore In Callable Arrays
  • Static Variables Are Linked To Their Method
  • Storage Of Static Properties Trait
  • Static Variable Accepts Functioncalls As Default
  • str_pos() Requires Only Strings
  • str_replace() Checks For Arguments
  • str_replace() On Arrays Of Objects
  • str_replace() Enforces Strings In Array Argument
  • String To Integer Comparison
  • Strings Are Bigger Than Integer
  • strpos() With Out-Of-Range Offset Is A Fatal Error
  • strpos() Emits TypeError
  • strpos() Emits ValueError
  • strpos() Does Not Accept False
  • strpos() With Integer Argument
  • strpos() Does Not Accept Null As Second Parameter
  • strpos() With Null Haystack
  • strsplit() With Empty String
  • str_split() Throws ValueError With Negative Lengths
  • substr() Returns Empty String On Out Of Bond Offset
  • switch() Changed Comparison Style
  • Tentative Static Returntype With Datetime
  • Ternary Associativity
  • throw Is An Expression
  • Trailing Comma In Arguments
  • Trailing Comma In Calls
  • Constants In Traits
  • Typed Class Constant
  • Undefined Constants
  • Unpack Arrays In Arrays
  • Unpack Array With String Keys
  • unserialize() Checks The End Of The String
  • unserialize() max_depth Option
  • unserialize() Error Report
  • (unset) Was Removed
  • var_export() Format
  • var_export() With Stdclass
  • version_compare() Stricter Operators
  • vsprint() Requires An Array
  • vsprintf() Returns Empty String On Error
  • Yield Must Use Integer Or String Keys
  • Cannot Raise Zero To Negative Powers
• PHP Error Messages

Indices and tables

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