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    Running php eval on code with tags

    By admin on Dec 1, 2015

    php eval on code wrapped in php tags

    Here is the code snippet which calls php eval on a code which is wrapped in <?php and ?> tags.

    <?php
    $code = '<?php echo "hello world\n";?>';
    echo "Doing eval...\n";
    eval($code);
    echo "Done...\n";
    ?>

    The outcome from above code is:

    Doing eval...
    
    Env: PHP 7.4.33 (Linux)

    php eval on code wrapped in php tags after prepending “?>”

    Here is the code snippet which calls eval on a code which is wrapped in <?php and ?> tags after prepending it with “?>”

    <?php
    $code = '<?php echo "hello world\n";?>';
    echo "Doing eval...\n";
    eval('?>' . $code);
    echo "Done...\n";
    ?>

    The outcome from above code is:

    Doing eval...
    hello world
    Done...
    
    Env: PHP 7.4.33 (Linux)

    Note that by default eval expect code without tags. But there are situation we need to execute a code which may have php tags (e.g. code read from a php file). In that case this approach can be used.

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    Posted in Tutorials | Tagged PHP, PHP cookbook, Tutorials
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