- rtrim: documentation ( source)
- var_export: documentation ( source)
- sprintf: documentation ( source)
<?php
echo var_export(20 / 3 * 1e6, true) . "\n";
echo var_export(6.66, true) . "\n";
echo var_export(6.0, true) . "\n";
echo "\n";
echo rtrim(sprintf('%.14F', 20 / 3 * 1e6), '0.') . "\n";
echo rtrim(sprintf('%.14F', 6.66), '0.') . "\n";
echo rtrim(sprintf('%.14F', 6.0), '0.') . "\n";