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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$a1 = 'name';
$a2 = 'email';
$a3 = 'hoe';
$c1 = [1,2,3,4];
$c2 = ['1,2,3,5'];
$e1 = implode( "cow ", $c1);
echo gettype($e1);
?>