php命令行(cli)下执行PHP脚本文件的相对路径的问题解决方法_php技巧

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Release: 2016-05-16 20:15:09
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在php命令行下执行.php文件时,执行环境的工作目录(getcwd( ))是php命令程序(php.exe)所在目录,所以如果想在文件内使用相对路径时,要先切换当前的工作目录才行。

小测试程序:

复制代码 代码如下:

 $oldpath = getcwd();    // 原始工作目录 php.exe所在目录
 $path = dirname(__FILE__);   
 chdir($path);           // 切换工作目录为当前文件所在目录
 $fpath = "forum/readme.txt";
 
 $fp = fopen($fpath, "a+b");    // 如果不切换工作目录这里会报找不到文件的错误
 fwrite($fp, "oldpath:".$oldpath."-newpath:".getcwd());
 fclose($fp);
?>

    需要用crotab定时执行的程序也会有这下问题。可以参考下面这篇文章:

使用php脚本写了一个脚本,需要在crontab中定期运行,但是出现如下错误

代码如下:

复制代码 代码如下:

/var/www/html/bt/e/BtSys:.:/usr/share/pear:/usr/share/phpPHP Warning: require(../class/connect.php): failed to open stream: No such file or directory in /var/www/html/bt/e/BtSys/torrents-scrape.php on line 17
PHP Fatal error: require(): Failed opening required '../class/connect.php' (include_path='/var/www/html/bt/e/BtSys:.:/usr/share/pear:/usr/share/php') in /var/www/html/bt/e/BtSys/torrents-scrape.php on line 17


尝试解决方法1 加入如下代码
复制代码 代码如下:

// setting include path
$cur_dir=getcwd();
$cur_dir=$basedir = dirname(__FILE__);
$path = ini_get('include_path');
ini_set("include_path", "$cur_dir:$path");
$path = ini_get('include_path');
//echo $path;
require(../class/a.php)
require(../class/b.php)
...............

运行失败

尝试解决方法2 加入如下代码

复制代码代码如下:

复制代码 代码如下:

$cur_dir = dirname(__FILE__);
chdir($cur_dir);
require(../class/a.php)
require(../class/b.php)

运行成功

总结: 在require 时,如果是相对目录,在crontab 中运行php脚本,要进入到脚本所在目录才可以

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