<?php
 
$regular_exression_filter_integer = '/^[0-9]+\.?$/';
 
$verify = "1.";
if (preg_match ($regular_exression_filter_integer, $verify)) { 
 echo "clean input";
 } else {
 echo "bad input";
}
echo "\n";
$verify = "123456";
if (preg_match ($regular_exression_filter_integer, $verify)) { 
 echo "clean input";
 } else {
 echo "bad input";
}
echo "\n";
$verify = "1.1";
if (preg_match ($regular_exression_filter_integer, $verify)) { 
 echo "clean input";
 } else {
 echo "bad input";
}
 

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