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gisela
Asked: 2020-10-04 21:15:50 +0800 CST 2020-10-04 21:15:50 +0800 CST

I have problems with "echo" empty in php

  • 772

I tell you, I have a form where only email addresses are loaded

The idea is that when a user enters, for example, [email protected], the page says, "you enter [email protected]" The problem I have with the echo is that when entering the page, it shows me the input "you entry" , how can I remove that?

<?php echo "usted ingreso $email"; ?>
php

2 Answers

  1. Best Answer

    You can do the echoonly if the variable exists and is not empty with the conditional if.

    <?php if (isset($email)) {echo "usted ingreso $email";} ?>
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  2. The result of the variable is displayed like this because when the page is loaded, no value is yet assigned to said variable.

    If you're using PHP 7, you can do it like this:

    <?php "Usted ingreso: ".$mail ?? "Usted aún no ingresa email alguno"; ?>

    Explanation

    • The operator ??checks if the variable is declared issetand not empty.empty
    • The value on the left hand side will be printed if the variable has a value assigned
    • The value on the right hand side will be printed if the variable is empty.
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