Welcome to PHP error messages database!

Contents:

• PHP Error Messages
  • A class constant must not be called class. it is reserved for class name fetching
  • A function with return type must return a value
  • A never-returning function must not return
  • A never-returning method must not return
  • A non-numeric value encountered
  • Array and string offset access syntax with curly braces is deprecated
  • Array and string offset access syntax with curly braces is no longer supported
  • Array callback has to contain indices 0 and 1
  • array_merge() does not accept unknown named parameters
  • Assignments can only happen to writable values
  • Attempt to unset static property X::$x
  • Attempt to unset static property
  • Automatic conversion of false to array is deprecated
  • b cannot implement a - it is not an interface
  • break operator accepts only positive integers
  • Call to a member function method() on string
  • Call to undefined function
  • Cannot access trait constant t::X directly
  • Cannot declare promoted property outside a constructor
  • Cannot instantiate trait t
  • Cannot make non abstract method i::foo() abstract in class j
  • Cannot mix keyed and unkeyed array entries in assignments
  • Cannot unset offset in a non-array variable
  • Cannot unset string offsets
  • Cannot use ‘readonly’ as method modifier
  • Cannot use ::class with dynamic class name
  • Cannot use [] for reading
  • Cannot use empty array elements in arrays
  • Cannot use empty list
  • Cannot use lexical variable $x as a parameter name
  • Cannot use list() as standalone expression
  • Cannot use object of type stdClass as array
  • Cannot use positional argument after argument unpacking
  • Cannot use positional argument after named argument
  • Cannot use temporary expression in write context
  • Cannot use try without catch or finally
  • Class foo cannot implement previously implemented interface i
  • Constant expression contains invalid operations
  • Constructors cannot declare a return type
  • continue operator accepts only positive integers
  • DateTimeInterface can’t be implemented by user classes
  • define(): Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported
  • define(): Declaration of case-insensitive constants is deprecated
  • Destructors cannot declare a return type
  • Duplicate named parameter $%s
  • Duplicate type false is redundant
  • Fetching properties on non-enums in constant expressions is not allowed
  • FFI API is restricted by “ffi.enable” configuration directive
  • foreach() argument must be of type array|object
  • has #[Override] attribute, but no matching parent method exists
  • illegal string offset
  • Implicit conversion from float-string “%s” to int loses precision
  • Implicitly marking parameter $%s as nullable is deprecated, the explicit nullable type must be used instead
  • Increment on type bool has no effect, this will change in the next major version of PHP
  • Indirect modification of overloaded element of %s has no effect
  • Indirect modification of overloaded property %s::$%s has no effect
  • Invalid argument supplied for foreach()
  • ‘%s’ is an invalid class name
  • Keys must be of type int|string during argument unpacking .
  • Keys must be of type int|string during array unpacking
  • Named parameter $x overwrites previous argument
  • never cannot be used as a parameter type
  • never-returning function must not implicitly return
  • New expressions are not supported in this context
  • Non-static method x::goo() cannot be called statically
  • Only variable references should be yielded by reference
  • Optional parameter $a declared before required parameter $b is implicitly treated as a required parameter
  • Private methods cannot be final as they are never overridden by other classes
  • Property x::$p cannot have type void
  • Readonly class Bar cannot extend non-readonly class Foo
  • Redefinition of parameter $b
  • Required parameter $%s follows optional parameter $%s
  • Required Trait T2 wasn't added to C
  • Required Trait T2 wasn't added to C
  • Return value must be of type int, string returned
  • Static property x::$y cannot be readonly
  • The (unset) cast is deprecated
  • The (unset) cast is no longer supported
  • Traits cannot have constants
  • Typed property %s::$%s must not be accessed before initialization
  • Typed property x::$y must not be accessed before initialization
  • Typed static property x::$y must not be accessed before initialization
  • Undefined array key
  • Undefined offset
  • Undefined variable
  • Uninitialized string offset
  • Unsupported operand types
  • Using $this when not in object context
  • Using (variable variables) in strings is deprecated, use {} instead
  • void cannot be used as a parameter type
  • X::foo() has #[Override] attribute, but no matching parent method exists

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