PHPWales 2020 - June 3rd to June 4th

Variable handling Functions

Table of Contents

  • boolval — Get the boolean value of a variable
  • debug_zval_dump — Dumps a string representation of an internal zend value to output
  • doubleval — Alias of floatval
  • empty — Determine whether a variable is empty
  • floatval — Get float value of a variable
  • get_defined_vars — Returns an array of all defined variables
  • get_resource_type — Returns the resource type
  • gettype — Get the type of a variable
  • import_request_variables — Import GET/POST/Cookie variables into the global scope
  • intval — Get the integer value of a variable
  • is_array — Finds whether a variable is an array
  • is_bool — Finds out whether a variable is a boolean
  • is_callable — Verify that the contents of a variable can be called as a function
  • is_countable — Verify that the contents of a variable is a countable value
  • is_double — Alias of is_float
  • is_float — Finds whether the type of a variable is float
  • is_int — Find whether the type of a variable is integer
  • is_integer — Alias of is_int
  • is_iterable — Verify that the contents of a variable is an iterable value
  • is_long — Alias of is_int
  • is_null — Finds whether a variable is NULL
  • is_numeric — Finds whether a variable is a number or a numeric string
  • is_object — Finds whether a variable is an object
  • is_real — Alias of is_float
  • is_resource — Finds whether a variable is a resource
  • is_scalar — Finds whether a variable is a scalar
  • is_string — Find whether the type of a variable is string
  • isset — Determine if a variable is declared and is different than NULL
  • print_r — Prints human-readable information about a variable
  • serialize — Generates a storable representation of a value
  • settype — Set the type of a variable
  • strval — Get string value of a variable
  • unserialize — Creates a PHP value from a stored representation
  • unset — Unset a given variable
  • var_dump — Dumps information about a variable
  • var_export — Outputs or returns a parsable string representation of a variable
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aldemarcalazans@gmail
2 months ago
I thought the PHP developers should include in this section, the operator "identity" ( see http://php.net/manual/en/language.operators.arithmetic.php).

From an arithmetic point of view, this operator is useless but, as a converter from string to number, it is great. It does not force the numerical string to have an integer or float type, instead, it automatically determines the adequate type, depending on the numerical quantity represented by the string.
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