CODEWITHSUNDEEP
phphtmlmathgeolocation
MrK
MrK

Reputation: 1078

How to figure out if a location is within a square (lat,lon) PHP

How can you figure out if this: 

$Now = array(
'lat' => '59.565423',
'long' => '7.347268'
);

is inside this:

$x = array(
'x1' => '59.570281',  // point 1, north west - lat
'y1' => '7.341667',   // ^^^^^^ - lon
'x2' => '59.570281',  // point 2, north east - lat
'y2' => '7.351087',   // ^^^^^^ - lon
'x3' => '59.568195',  // point 3, south east - lat
'y3' => '7.351087',   // ^^^^^^ - lon
'x4' => '59.568195',  // point 4, south west - lat
'y4' => '7.341667'    // ^^^^^^ - lon
 );

Supposed to return 1 if inside or 0 if outside.

Upvotes: 0

Views: 365

Answers (1)

MrK
MrK

Reputation: 1078

Here is how:

  • first you need to check if longitude is within your |---| area so:

    if($Now['long'] > $x['y1'] && $Now['long'] < $x['y2'])

    • then you need to check if the latitude is within the parameters:

    if($Now['lat'] < $x['x1'] && $Now['lat'] > $x['x4'])

Whole function:

function InsideOrNot($Now, $x){
    //If 0 is within |----| (|--0--|)
    if($Now['long'] > $x['y1'] && $Now['long'] < $x['y2']){

        //if 0 is within ___
        //                |
        //               ___   
        if($Now['lat'] < $x['x1'] && $Now['lat'] > $x['x4']){
            return 1;
        }

        else{
            return 0;
        }
    }
    else{
        return 0;
    }


}

Now: echo InsideOrNot($Now, $x);

Upvotes: 1

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