All we need to know about PHP

1. Some PHP closing tag information -

We can skip adding closing tag if only writing PHP code. But while writing with other languages, ex - HTML, we must need to add closing tag.

Semicolon in the last line of PHP can be omitted. For example.

<?php

echo "Hi"; // semicolon needed here

echo "hello" // semicolon can be omitted here

?>

2. We can enable strict mode in php by writing

declare('strict_type=1)

This will enable strict type checking in php. For instance, usually php convert a number to a number if it is written like this '2'. But if we enable strict_type then it won't do this. It is better to keep enabled strict_type to avoid some bugs, specially if we are doing some kind of calculation type of functionality.

3. Callable is a type which make a varibale or function callable. We can send it as a function argument type in a function.

function printName( callable $callable) {

if(is_callable($callable)){

$callable('forhad');

}

}

$callableFunction = function ($name) {

echo $name;

};

printName($callableFunction);

printName(function ($name) {

echo "<br/> this is a new callable function";

});