function bar(): iterable { return [1, 2, 3]; } function gen(): iterable { yield 1; yield 2; yield 3; } foreach (bar() as $value) { echo $value; # => 123 }
$a = null; $b = 'Hello php!'; echo $a ?? 'a is unset'; # => a is unset echo $b ?? 'b is unset'; # => Hello php $a = array(); $a == null # => true $a === null # => false is\_null($a) # => false
$float1 = 1.234; $float2 = 1.2e7; $float3 = 7E-10; $float4 = 1\_234.567; // as of PHP 7.4.0 var\_dump($float4); // float(1234.567) $float5 = 1 + "10.5"; # => 11.5 $float6 = 1 + "-1.3e3"; # => -1299
$int1 = 28; # => 28 $int2 = -32; # => -32 $int3 = 012; # => 10 (octal) $int4 = 0x0F; # => 15 (hex) $int5 = 0b101; # => 5 (binary) # => 2000100000 (decimal, PHP 7.4.0) $int6 = 2\_000\_100\_000;
See also: Integers
$boolean1 = true; $boolean2 = TRUE; $boolean3 = false; $boolean4 = FALSE; $boolean5 = (boolean) 1; # => true $boolean6 = (boolean) 0; # => false
Boolean are case-insensitive
