- var_dump: documentation ( source)
<?php
$variableName = 'MyVariable';
$variableName .= '900';
// Create new variable with the name defined in variable $variableName
${$variableName} = 'MyValue';
${$variableName} .= '900';
//Outputs: string(7) "MyValue"
var_dump($MyVariable);
//Outputs: string(7) "MyValue"
var_dump(${'MyVariable'});