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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$x1 = "x1";
$x2 = "x2";
$y1 = "y1";
$y2 = "y2";
$x = [];
$y = [];
$goal = [];
array_push($x, $x1, $x2);
array_push($y, $y1, $y2);
array_push($goal, $x, $y);
print_r($goal);