[PHP-NOTES] note 130511 added to language.types.float

Since actual values can vary slightly, $epsilon may not be set according to your configuration. You can replace $epsilon with PHP_FLOAT_EPSILON. There is also, in my opinion, a more elegant method for checking float equality:

<?php
// bccomp will returns 0 for equality, 1 if $value1 is greater and -1 otherwise
if (bccomp($value1, $value2) == 0) {
  // equals
}
?>
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