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<?php $coords = '50.9021998447,54.5317653741,0 50.9028864902,54.5329730884,0 50.9032083553,54.5338570628,0 50.9034658473,54.5342181172,0 50.9067261603,54.5362910206,0 50.9068334487,54.5363283689,0 50.9074867425,54.5364217688,0 50.9079051671,54.5365089147,0 50.908044642,54.5366894306,0 50.9083986936,54.5368201485,0 50.9091818986,54.5369259675,0 50.9097183404,54.5371002569,0 50.9098685441,54.5372434227,0 50.9097183404,54.5373990371,0 50.9091926274,54.5373616897,0 50.9088385759,54.5373616897,0 50.9087420163,54.5375422018,0 50.9088385759,54.5378907747,0 50.9090279355,54.5384074476,0 50.9096287503,54.5385568332,0 50.9112380757,54.5386066283,0 50.9123753323,54.5386813208,0 50.9127186551,54.5389302947,0 50.9128259434,54.5395527231,0 50.9131907238,54.5401626936,0 50.9144567265,54.5402996245,0 50.9178684964,54.538843154,0 50.9199928059,54.5379841855,0 50.9204005017,54.5376480625,0 50.9216450467,54.5369135618,0 50.9228895916,54.5364404866,0 50.9235333218,54.5362412953,0 50.9247993245,54.5360296536,0 50.9264730229,54.5356810648,0 50.9277390255,54.5355067693,0 50.9282540097,54.5353947218,0 50.9284900441,54.5352453247,0 50.9284900441,54.5349838783,0 50.9249066128,54.5286339533,0 50.9244774594,54.5285841461,0 50.9241985096,54.5280362625,0 50.9245632901,54.5278370302,0 50.9249066128,54.5278743863,0 50.9248207821,54.52753818,0 50.9244130864,54.527201971,0 50.9228895916,54.5244997458,0 50.9224604382,54.5243254026,0 50.9165381207,54.5242008712,0 50.8997796788,54.5229928974,0 50.8995865597,54.5232170602,0 50.9002302899,54.5261186119,0 50.917825581,54.5269404731,0 50.918674764,54.5300130107,0 50.901259005,54.5293156983,0 50.9013246312,54.5295802793,0 50.9015177502,54.530775607,0 50.9021998447,54.5317653741,0'; $regex = '(\-?\d+(\.\d+)?),\s*(\-?\d+(\.\d+)?)'; var_dump(preg_match($pattern, $coords));