log_var_dump.php

<?php    

ob_start();                    // start buffer capture
var_dump( $VARIABLE );           // dump the values
$VARIABLE_CONTENTS = ob_get_contents(); // put the buffer into a variable
ob_end_clean();                // end capture
error_log( $VARIABLE_CONTENTS );        // log contents of the result of var_dump( $object )

/*
add to php.ini
error_reporting = E_ALL & ~E_NOTICE
error_log = /errors.log
log_errors = On

and create in main dir errors.log
*/

?>