debug_trace.php

<?php
static $traces;
if (!isset($traces)) {
    $traces = array();
}
if (stripos($sql, "SELECT `t_acct_user`.* FROM `t_acct_user` WHERE `user_id` = '") !== false) {
    var_dump($sql);

    $trace = implode(' <== ', array_map(function($e){
                $func = isset($e['class']) ? "$e[class]::$e[function]" : $e['function'];
                return "$e[file]:$e[line] $func";
            }, debug_backtrace()));
    if (isset($traces[$trace])) {
        $traces[$trace] ++;
    } else {
        $traces[$trace] = 1;
    }
    print_r($traces);
    var_dump(max($traces));
}

pretty_print_debug_trace.php

<?php
$trace = implode("\n".' <== ', array_map(function($e){
            $func = isset($e['class']) ? "$e[class]::$e[function]" : $e['function'];
            return "$e[file]:$e[line] $func";
        }, debug_backtrace()));
echo "$trace";
exit();