php - 记录所有执行的行

Question

是否有一种简单的方法(除了在每一行之后粘贴 fwrites)让 PHP 将每行执行的行写入日志？

Answer 1

虽然我同意@gnif 因为调试器最适合它，但我仍然会回答你的问题，因为这是可能的(不完美，但可能)。

假设您有以下代码:

sometest.php

<?php

declare(ticks=1);

include_once 'debug.php';

$a = 'foo';
$b = 'bar';
$c = $a . $b;
$d = $e = "hello";
strlen($d);

include 'somefile.php';

somefile.php

<?php

$hello = 'world';

因此，sometest.php 包含以下文件 (debug.php):

<?php

register_tick_function(function(){
    $backtrace = debug_backtrace();
    $line = $backtrace[0]['line'] - 1;
    $file = $backtrace[0]['file'];

    if ($file == __FILE__) return;

    static $fp, $cur, $buf;
    if (!isset($fp[$file])) {
        $fp[$file] = fopen($file, 'r');
        $cur[$file] = 0;
    }

    if (isset($buf[$file][$line])) {
        $code = $buf[$file][$line];
    } else {
        do {
            $code = fgets($fp[$file]);
            $buf[$file][$cur[$file]] = $code;
        } while (++$cur[$file] <= $line);
    }

    $line++;
    echo "$code called in $file on line $line\n";
});

它registers a tick function , 还有 declares the tick interval .它将跟踪使用回溯调用的文件/行。

现在，如果我们执行 sometest.php，我们将得到:

include_once 'debug.php';
 called in sometest.php on line 5
$a = 'foo';
 called in sometest.php on line 7
$b = 'bar';
 called in sometest.php on line 8
$c = $a . $b;
 called in sometest.php on line 9
$d = $e = "hello";
 called in sometest.php on line 10
strlen($d);
 called in sometest.php on line 11
$hello = 'world';
 called in somefile.php on line 3
include 'somefile.php';
 called in sometest.php on line 13

您可以看到 somefile.php 包含在最后，即使它是在 $hello = 'world' 之前调用的。这是因为 tick 函数将在该行的包含完成时被调用，而不是在它开始时被调用。

此外，在函数/方法声明中调用 tick 函数:

<?php

function foo() {
    return 'bar';
}

foo();

会给你这样的东西:

}
 called in somefunc.php on line 5   # this is the function declaration
foo();
 called in somefunc.php on line 7   # this is the function call

注意:使用 ticks 时要小心，因为在 5.3.0 之前，线程 Web 服务器不支持它。