php - If a condition is true in back end page, then show me dialogue box into front end page -

i tried best output of code, unfortunately did't output. want display dialogue box page.

<?php     echo '<srcipt type="text/javascript">';     echo 'alert("your input value invalid");';     echo '</srcipt>'; ?>

though given in comment guess op still can't able it, make end,

here's answer

you have typo in srcipt instead of script

just change inside code, work fine

<?php     echo '<script type="text/javascript">';     echo 'alert("your input value invalid");';     echo '</script>'; ?>

and recommend in single line instead of having 3 echo

<?php     echo '<script type="text/javascript">alert("your input value invalid");</script>'; ?>

Call