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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$test1 = 3;
$test2 = 2.5;
$test3 = false;
$test4 = "abc";
$test5[] = {1,2,3,4,5};
$test6 = $test4;
$test7 = null;
printf("type of test1 : %s" , gettype($test1) );