PHP连接删除了一些字符，太疯狂了！PHP 内部错误

我已经使用PHP开发了好几年了。

但是今天我阻止了一个我无法解释的问题，这是一个非常简单的串联，但它的结果很糟糕（结果字符串末尾缺少字符）;

这是代码：

$select = $this -> phpSqlCreator -> processSELECT2($this -> phpSqlParser -> parsed);
$from = $this -> phpSqlCreator -> processFROM2($this -> phpSqlParser -> parsed['FROM']);
$where = $this -> whereString;
$sql = $select . ' ' . $from . ' ' . $where;

当我调试这段代码时，这就是我所看到的。

$select变量包含以下字符串：

SELECT DISTINCT t.id as "t.id",t.creation_date as "t.creation_date",t.default_language_code as 
 "t.default_language_code",t.name as "t.name",t.description as "t.description",t.document_store_path as 
 "t.document_store_path",t.type as "t.type",t.left_value as "t.left_value",t.right_value as "t.right_value",t.event_id as 
 "t.event_id",t.parent_id as "t.parent_id",t2.id as "t2.id",t2.creation_date as 
 "t2.creation_date",t2.default_language_code as "t2.default_language_code",t2.name as "t2.name",t2.description 
 as "t2.description",t2.document_store_path as "t2.document_store_path",t2.type as "t2.type",t2.left_value as 
 "t2.left_value",t2.right_value as "t2.right_value",t2.event_id as "t2.event_id",t2.parent_id as "t2.parent_id"

然后，$from变量包含以下字符串：

FROM team t , (SELECT t.* FROM team t LEFT JOIN team_role tr ON (t.id = tr.team_id) WHERE 
 tr.participant_id = ? UNION SELECT t.* FROM team t LEFT JOIN team_role tr ON (t.id = tr.team_id) LEFT JOIN 
 unit_role ur ON (tr.unit_id = ur.unit_id) WHERE ur.participant_id = ?) as dt LEFT JOIN team t2 ON ("t.parent_id" = t2.id)

$where变量包含：

WHERE t.left_value < dt.left_value and t.right_value > dt.right_value and t.event_id = dt.event_id

$sql变量包含：

SELECT DISTINCT t.id as "t.id",t.creation_date as "t.creation_date",t.default_language_code as 
 "t.default_language_code",t.name as "t.name",t.description as "t.description",t.document_store_path as 
 "t.document_store_path",t.type as "t.type",t.left_value as "t.left_value",t.right_value as "t.right_value",t.event_id as 
 "t.event_id",t.parent_id as "t.parent_id",t2.id as "t2.id",t2.creation_date as 
 "t2.creation_date",t2.default_language_code as "t2.default_language_code",t2.name as "t2.name",t2.description 
 as "t2.description",t2.document_store_path as "t2.document_store_path",t2.type as "t2.type",t2.left_value as 
 "t2.left_value",t2.right_value as "t2.right_value",t2.event_id as "t2.event_id",t2.parent_id as "t2.parent_id" FROM 
 team t , (SELECT t.* FROM team t LEFT JOIN team_role tr ON (t.id = tr.team_id) WHERE tr.participant_id = ? 
 UNION SELECT t.* FROM team t LEFT JOIN team_role tr ON (t.id = tr.team_id) LEFT JOIN unit_role ur ON 
 (tr.unit_id = ur.unit_id) WHERE ur.participant_id = ?) as dt LEFT JOIN team t2 ON (

串联非常简单但不起作用，缺少$from字符串变量的末尾，也缺少$where字符串变量的完整内容。我不明白，因为代码非常简单。

此外，这种代码的平静是由一组自动单元测试执行的。这很奇怪，因为当使用 PHPUnit（所以 PHP Cli）执行代码时，串联的结果是好的（我们所有的测试都是成功的）。

只有在我们的 Web 应用程序（Windows 8 机器上的标准 Apache 2.2.22 + PHP 5.3.13 设置）中执行代码时，才会遇到这种串联问题。

你知道是什么导致了这个非常奇怪的问题吗？PHP 设置？PHP 5.3.13 版本的 PHP 错误？调试时在字符串中看不到奇怪的字符？我没看到什么明显的东西，因为我今晚太累了？