Convert String to custom array PHP - php

Question

i have problem in my function php .
My function php is to check coordinates whether the coordinates are in polygons .
the problem is , i call polygon latlong from database and type data is string and convert to custom array .
this my function
function containsMaps($point1,$value1)
{
$point = preg_split ("/\,/", $point1);
$value = $value1;
foreach(explode('),(',trim($value,'()')) as $single_array){
$sub_array= array();
foreach(explode(',',$single_array) as $sbs_array)
{
$sub_array = array($sbs_array);
}
$polygon = array($sub_array);
}
if($polygon[0] != $polygon[count($polygon)-1])
$polygon[count($polygon)] = $polygon[0];
$j = 0;
$oddNodes = false;
$x = $point[1];
$y = $point[0];
$n = count($polygon);
for ($i = 0; $i < $n; $i++)
{
$j++;
if ($j == $n)
{
$j = 0;
}
if ((($polygon[$i][0] < $y) && ($polygon[$j][0] >= $y)) || (($polygon[$j][0] < $y) && ($polygon[$i][0] >=
$y)))
{
if ($polygon[$i][1] + ($y - $polygon[$i][0]) / ($polygon[$j][0] - $polygon[$i][0]) * ($polygon[$j][1] -
$polygon[$i][1]) < $x)
{
$oddNodes = !$oddNodes;
}
}
}
return $oddNodes;
}
the polygon data from database like this :
(-6.268649975971238, 106.69106266990389),(-6.267711482694832, 106.72625325217928),(-6.288272630052733, 106.72736905112947),(-6.288699201273463, 106.69106266990389)
if i use static data like this , the function working :
$polygon = array(
array(-6.2811957386588855, 106.70141951079609),
array(-6.281142416506361, 106.70432702536823),
array(-6.2781776962328815, 106.70438066954853),
array(-6.2781776962328815, 106.70136586661579),
);

Answer 1

Your code to split the incoming data isn't quite right. This will work:
foreach(explode('),(',trim($value,'()')) as $single_array){
$polygon[] = explode(',',$single_array);
}
Output:
array (
0 =>
array (
0 => '-6.268649975971238',
1 => ' 106.69106266990389',
),
1 =>
array (
0 => '-6.267711482694832',
1 => ' 106.72625325217928',
),
2 =>
array (
0 => '-6.288272630052733',
1 => ' 106.72736905112947',
),
3 =>
array (
0 => '-6.288699201273463',
1 => ' 106.69106266990389',
),
)
Demo on 3v4l.org
Note this will give you string values, if you want floating point values, use code like this:
foreach(explode('),(',trim($value,'()')) as $single_array){
list ($x, $y) = explode(',',$single_array);
$polygon[] = array((double)$x, (double)$y);
}
Demo on 3v4l.org