Returns the names and details of the functions
that can be applied on geometry data types.
| public static getGISFunctions ( string $geom_type = null, boolean $binary = true, boolean $display = false ) : array | ||
| $geom_type | string | if provided the output is limited to the functions that are applicable to the provided geometry type. |
| $binary | boolean | if set to false functions that take two geometries as arguments will not be included. |
| $display | boolean | if set to true separators will be added to the output array. |
| return | array | names and details of the functions that can be applied on geometry data types. |
/**
* Return the where clause for a geometrical column.
*
* @param mixed $criteriaValues Search criteria input
* @param string $names Name of the column on which search is submitted
* @param string $func_type Search function/operator
* @param string $types Type of the field
* @param bool $geom_func Whether geometry functions should be applied
*
* @return string part of where clause.
*/
private function _getGeomWhereClause($criteriaValues, $names, $func_type, $types, $geom_func = null)
{
$geom_unary_functions = array('IsEmpty' => 1, 'IsSimple' => 1, 'IsRing' => 1, 'IsClosed' => 1);
$where = '';
// Get details about the geometry functions
$geom_funcs = Util::getGISFunctions($types, true, false);
// If the function takes multiple parameters
if ($geom_funcs[$geom_func]['params'] > 1) {
// create gis data from the criteria input
$gis_data = Util::createGISData($criteriaValues);
$where = $geom_func . '(' . Util::backquote($names) . ', ' . $gis_data . ')';
return $where;
}
// New output type is the output type of the function being applied
$type = $geom_funcs[$geom_func]['type'];
$geom_function_applied = $geom_func . '(' . Util::backquote($names) . ')';
// If the where clause is something like 'IsEmpty(`spatial_col_name`)'
if (isset($geom_unary_functions[$geom_func]) && trim($criteriaValues) == '') {
$where = $geom_function_applied;
} elseif (in_array($type, Util::getGISDatatypes()) && !empty($criteriaValues)) {
// create gis data from the criteria input
$gis_data = Util::createGISData($criteriaValues);
$where = $geom_function_applied . " " . $func_type . " " . $gis_data;
} elseif (mb_strlen($criteriaValues) > 0) {
$where = $geom_function_applied . " " . $func_type . " '" . $criteriaValues . "'";
}
return $where;
}