Analyze called function with non-standard php feature to enhance functionality on expected result by caller-identifier

php-magic.php

<?php
echo ''; /* sdfds */ echo ''; ;; ! phpMagic(); // echo $i; ?> <?php
;;; +phpMagic(); // $increment with 1;
@phpMagic(); // $increment with 1;
/* $decrement with 1 ;;; */-phpMagic();// $decrement with 1;
/* comment ;;; */ \phpMagic(); /* another comment ;;; */ \phpMagic(); // $decrement with 1;

function phpMagic() {
    $poped = array_pop(debug_backtrace());
    $fullLine = file($poped['file'])[$poped['line']-1];

    foreach (explode(';', $fullLine) as $statements) {
    	if (preg_match('%(.\s*'.$poped['function'].')\s*\(%', $statements, $match) ) {
    	    $statement = trim($match[1]);
    	}
    }
    
    // called with substr( $statement, 0, 1 ); ! @ + - \

    echo $statement . '<br />';
}