regex101: PCRE2 (PHP) Match Workspace

(?x)applies the following effective flags to the remainder of the pattern: gmx

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

\s*any whitespace character, repeated any number of times

Group with flags gmx(?-i:\bfunction\b)?

?repeats the group contents below at most once:

i modifier: -insensitive. Case-sensitive match

\ban ASCII word boundary

functionthe literal text function (case sensitive)

\ban ASCII word boundary

\s*any whitespace character, repeated any number of times

Character Class[A-Za-z_$]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

Character Class[\w$]*

*matches any number of characters from the set below:

\wany word character

$the literal $ (36₁₀ / 44₈ / 24₁₆)

\s*any whitespace character, repeated any number of times

Group with flags gmx(?-i:\bfunction\b)?

?repeats the group contents below at most once:

i modifier: -insensitive. Case-sensitive match

\ban ASCII word boundary

functionthe literal text function (case sensitive)

\ban ASCII word boundary

\s*any whitespace character, repeated any number of times

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^()]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\s*any whitespace character, repeated any number of times

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

(?x)\s*(?-i:\bfunction\b)?\s*[A-Za-z_$][\w$]*\s*(?-i:\bfunction\b)?\s*\s*\([^()]*\)\s*\{

New

class Entity
{
	constructor(game,imageURL)
	{
		this.game   = game;
		this.sprite = new Sprite(this.game.c,imageURL);
		
	}
	
	
	draw(depth,offset,textureSize,textureCoordinates,offsetX=0)
	{
		let scaleFactors = {
			1:1,
			2:0.65,
			3:0.45
		};
		let scaleFactor = scaleFactors[depth];
		
		let x = Math.floor(offset.x + textureCoordinates[0] + (textureSize[0] / 2) - (this.sprite.image.width * scaleFactor / 2));
		let y = Math.floor(offset.y + textureCoordinates[1] + (textureSize[1] / 2) - (this.sprite.image.height * scaleFactor) + 6 * scaleFactor);
		
		x = x + offsetX * scaleFactor;
		
		let width  = Math.floor(this.sprite.image.width * scaleFactor);
		let height = Math.floor(this.sprite.image.height * scaleFactor);
		
		let entityFades = {
			1:1,
			2:0.5,
			3:0.1
		}
		let filter = '';
		if(this.game.level.entities.fadeType === 'darken')
		{
			filter += 'brightness('+entityFades[depth]+')';
		}
		
		this.sprite.draw(
			x,
			y,
			width,
			height,
			0,
			0,
			this.sprite.image.width,
			this.sprite.image.height,
			filter
		);
	}
}

Regular Expressions 101

Regular Expression

Extraction