function sigmoid($t){
return 1 / (1 + exp(-$t));
}
Here is what the above code is Doing:
1. We’re defining a function called sigmoid that takes in a number t and returns the value of the sigmoid function applied to t.
2. We’re using the built-in exp function to calculate the exponential of t.
3. We’re using the built-in exp function to calculate the exponential of -t.
4. We’re dividing 1 by the sum of 1 and the exponential of -t.
$ext = pathinfo($filename, PATHINFO_EXTENSION); Here is what the above code is Doing: 1. We’re using the pathinfo() function to get the extension of the file. 2. We’re passing the $filename variable as the first argument to the pathinfo() function. 3. We’re passing the PATHINFO_EXTENSION constant as the second argument to the pathinfo() function. 4. We’re…
// Controller public function __construct() { $this->middleware(‘auth’); } Here is what the above code is Doing: 1. We’re using the auth middleware to protect the route. 2. We’re using the auth middleware to protect the controller. The auth middleware is included in the web middleware group, so we don’t need to add it to the…
//Copies an existing object $objectA = clone $objectB; Here is what the above code is Doing: 1. Create a new object called $objectA 2. Copy the properties of $objectB into $objectA 3. Return the new object
//Unlimited momory limit ini_set(‘memory_limit’, ‘-1’); //Fixed memory limit ini_set(‘memory_limit’,’2048M’); Here is what the above code is Doing: 1. The first line is setting the memory limit to unlimited. 2. The second line is setting the memory limit to 2GB.
$data = ‘my data’ . PHP_EOL . ‘my data’; $fp = fopen(‘my_file’, ‘a’); fwrite($fp, $data); fclose($fp); Here is what the above code is Doing: 1. We’re opening a file called my_file in append mode. 2. We’re writing the string my data\nmy data to the file. 3. We’re closing the file.
