A readable if this-then-that-and-else-this-then-that-and... function wrapper.

ifthisthenthatand.php

<?php

function if_( $value ) {
	return new class( (bool) $value ) {
		public $run, $and;
		public $cb = [];
		function __construct( $run ) { $this->run = $run; }
		function __destruct() {
			foreach ( $this->cb as $cb ) {
				$cb ? $cb() : null;
			}
		}
		
		function then_( $cb ) {
			if ( $this->run ) {
				$this->cb[] = $cb;
				$this->run = false;
				$this->and = true;
			} else {
				$this->run = true;
				$this->and = false;	
			}
			return $this;
		}
		
		function else_( $cb ) {
			return $this->then_( $cb );
		}
		
		function and_( $cb ) {
			if ( $this->and ) {
				$this->run = true;
				$this->and = false;
			} else{
				$this->run = false;
				$this->and = false;
			}
			return $this->then_( $cb );
		}
	};
}

/**
 * Example:
 */

if_( true )->then_( '_do' )->and_( '_do_that' )->else_( '_dont' )->and_( '_dont_that' );
echo "\n";
if_( false )->then_( '_do' )->and_( '_do_that' )->else_( '_dont' )->and_( '_dont_that' );

function _do() {
	print 'yay1';
}
function _do_that() {
	print '-yay2';
}

function _dont() {
	print 'nay1';
}
function _dont_that() {
	print '-nay2';
}