PHP: function strtoul

We know function strtoul in C++: converts the string into an unsigned long int according to the base of the number unsigned long int strtoul…

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…

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:…

PHP: detect Point in Polygon

PHP function to detect Point in Polygon: Test for convex polygon: Result: IN OUT Test for concave polygon: Result: OUT IN OUT Note: we only…

PHP: Calculate Distance Between Two Coordinates

This routine calculates the distance between two points (given the latitude/longitude of those points). It is being used to calculate the distance between two locations:…

PHP: convert javascript escape string to CP1251

This function can convert javascript escape string to CP1251: Example 2: result: ຈະນານຸກົມພິເສດ Read more: PHP: convert javascript escape string to UTF8

PHP: convert javascript escape string to UTF8

Read first: PHP: PHP: Convert Numeric Character Reference to UTF8 Example 1: U+0621: ARABIC LETTER HAMZA Java Escape: “\u0621” Javascript Escape: “\u0621” result: ء We…