查看和调试准备好的PDO查询，而无需查看MySQL日志 [英] View and debug prepared PDO query without looking at MySQL logs

问题描述

我想看看PDO正在准备什么而无需查看MySQL日志.基本上，它是在执行查询之前就建立的最终查询.

I want to see what PDO is preparing without looking into the MySQL logs. Basically the final query it has built right before it executes the query.

有没有办法做到这一点?

Is there a way to do this?

推荐答案

没有内置方法. bigwebguy 创建了一个函数来实现

There is no built-in way to do it. bigwebguy created a function to do it in one of his answers:

/**
 * Replaces any parameter placeholders in a query with the value of that
 * parameter. Useful for debugging. Assumes anonymous parameters from 
 * $params are are in the same order as specified in $query
 *
 * @param string $query The sql query with parameter placeholders
 * @param array $params The array of substitution parameters
 * @return string The interpolated query
 */
public static function interpolateQuery($query, $params) {
    $keys = array();

    # build a regular expression for each parameter
    foreach ($params as $key => $value) {
        if (is_string($key)) {
            $keys[] = '/:'.$key.'/';
        } else {
            $keys[] = '/[?]/';
        }
    }

    $query = preg_replace($keys, $params, $query, 1, $count);

    #trigger_error('replaced '.$count.' keys');

    return $query;
}

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