check_english.php

<?php
$str="ሀልሕፙ፴";

echo strlen($str);
echo "\n";
echo strlen(utf8_decode($str));
if (strlen($str) != strlen(utf8_decode($str))) {
        echo "no";
    } else {
        echo "yes";
    }
?>

this PHP gist used to check whether a given string is English or not