This article mainly introduces the debugging information about the debug_backtrace() function print call in PHP. It has a certain reference value. Now I share it with you. Friends in need can refer to it

debug_backtrace

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

debug_backtrace —Generate a backtrace

Description

##arraydebug_backtrace ([int$options= DEBUG_BACKTRACE_PROVIDE_OBJECT [,int$limit= 0 ]] )

Parameters

• options

As of 5.3.6, this parameter is the following Bit mask of options:

• debug_backtrace() option DEBUG_BACKTRACE_PROVIDE_OBJECT DEBUG_BACKTRACE_IGNORE_ARGS Before 5.3.6, the only values that could be used were

  Whether to fill in "object" index.
  Whether to ignore the index of "args", including all function/method parameters, can save memory overhead.

  TRUE

  orFALSE, which were respectively equal to whether to setDEBUG_BACKTRACE_PROVIDE_OBJECToption.

• limit

As of 5.4.0, this parameter can be used to limit the number of stack frames returned. The default is (
• limit

  =0), which returns all stack frames.

Return value

Returns an

Example

Example #1debug_backtrace() Example

Execution The result returned is similar to the following:

Hi: friend array(2) { [0]=> array(4) { ["file"] => string(10) "/tmp/a.php" ["line"] => int(10) ["function"] => string(6) "a_test" ["args"]=> array(1) { [0] => &string(6) "friend" } } [1]=> array(4) { ["file"] => string(10) "/tmp/b.php" ["line"] => int(2) ["args"] => array(1) { [0] => string(10) "/tmp/a.php" } ["function"] => string(12) "include_once" } }

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