diff options
Diffstat (limited to 'php.html.markdown')
| -rw-r--r-- | php.html.markdown | 57 |
1 files changed, 54 insertions, 3 deletions
diff --git a/php.html.markdown b/php.html.markdown index 0504ced2..24d656fa 100644 --- a/php.html.markdown +++ b/php.html.markdown @@ -53,6 +53,8 @@ $int1 = 12; // => 12 $int2 = -12; // => -12 $int3 = 012; // => 10 (a leading 0 denotes an octal number) $int4 = 0x0F; // => 15 (a leading 0x denotes a hex literal) +// Binary integer literals are available since PHP 5.4.0. +$int5 = 0b11111111; // 255 (a leading 0b denotes a binary number) // Floats (aka doubles) $float = 1.234; @@ -86,6 +88,8 @@ $escaped = "This contains a \t tab character."; $unescaped = 'This just contains a slash and a t: \t'; // Enclose a variable in curly braces if needed +$apples = "I have {$number} apples to eat."; +$oranges = "I have ${number} oranges to eat."; $money = "I have $${number} in the bank."; // Since PHP 5.3, nowdocs can be used for uninterpolated multi-liners @@ -116,11 +120,11 @@ echo 'Multiple', 'Parameters', 'Valid'; // Returns 'MultipleParametersValid' // a valid constant name starts with a letter or underscore, // followed by any number of letters, numbers, or underscores. -define("FOO", "something"); +define("FOO", "something"); // access to a constant is possible by calling the choosen name without a $ echo FOO; // Returns 'something' -echo 'This outputs '.FOO; // Returns 'This ouputs something' +echo 'This outputs ' . FOO; // Returns 'This ouputs something' @@ -140,6 +144,9 @@ $associative = ['One' => 1, 'Two' => 2, 'Three' => 3]; echo $associative['One']; // prints 1 +// Add an element to an associative array +$associative['Four'] = 4; + // List literals implicitly assign integer keys $array = ['One', 'Two', 'Three']; echo $array[0]; // => "One" @@ -534,10 +541,23 @@ class MyClass print 'MyClass'; } - //final keyword would make a function unoverridable + // final keyword would make a function unoverridable final function youCannotOverrideMe() { } + + // Magic Methods + + // what to do if Object is treated as a String + public function __toString() { + return $property; + } + + // opposite to __construct() + // called when object is no longer referenced + public function __destruct() { + print "Destroying"; + } /* * Declaring class properties or methods as static makes them accessible without @@ -765,6 +785,37 @@ I'm a ParentClass But I'm ChildClass */ +/********************** +* Magic constants +* +*/ + +// Get current class name. Must be used inside a class declaration. +echo "Current class name is " . __CLASS__; + +// Get full path directory of a file +echo "Current directory is " . __DIR__; + + // Typical usage + require __DIR__ . '/vendor/autoload.php'; + +// Get full path of a file +echo "Current file path is " . __FILE__; + +// Get current function name +echo "Current function name is " . __FUNCTION__; + +// Get current line number +echo "Current line number is " . __LINE__; + +// Get the name of the current method. Only returns a value when used inside a trait or object declaration. +echo "Current method is " . __METHOD__; + +// Get the name of the current namespace +echo "Current namespace is " . __NAMESPACE__; + +// Get the name of the current trait. Only returns a value when used inside a trait or object declaration. +echo "Current namespace is " . __TRAIT__; /********************** * Error Handling |