PHP: How to extract string between 2 words
How to extract string between two words. How to parse a string between two strings. We offer 3 functions to obtain a string delimited between…
Month: December 2012
PHP: How to determine the center of a Polygon
How to determine the center of a Polygon. Read first: PHP: How to calculate signed area of a Polygon Method 1: Result: array(2) { [0]=>…
PHP: How to check if polygon is concave or convex?
How to check if polygon is concave or convex? Note: It is assumed that the polygon is simple (does not intersect itself or have holes)…
PHP: How to check if the vertices of polygon are in clockwise or counter-clockwise order?
How to check if the vertices of polygon are in clockwise or counter-clockwise order? There are many of method to check this. We offer some…
PHP: How to calculate signed area of a Polygon
Calculating the signed area for an polygon can be found when you know the coordinates of the vertices. We offer 3 methods below: Method 1:…