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Haversine Formula


ShoeLace1291

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I'm using the haversine formula to calculate the distance between two latitude/longitude pairs.  I'm getting a syntax error that says the funcion radians is undefined.  I got the code off of the Google Store Locator tutorial which was a mysql query based syntax.  I realize that the mysql functions are very different from PHP functions, so what would be the equivalent php function to the mysql "radians" function?

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