An example of how PHP custom functions record logs

This article mainly introduces the method of PHP recording logs based on custom functions, involving PHP related operating skills for files, directories and error logs. Friends in need can refer to it

The example of this article tells the PHP based on Custom function recording log method. Share it with everyone for your reference, the details are as follows:

/**
 * 记录错误日志
 * @param 日志内容 $res
 */
function save_log($res) {
  $err_date = date("Ym", time());
  //$address = '/var/log/error';
  $address = './error';
  if (!is_dir($address)) {
    mkdir($address, 0700, true);
  }
  $address = $address.'/'.$err_date . '_error.log';
  $error_date = date("Y-m-d H:i:s", time());
  if(!empty($_SERVER['HTTP_REFERER'])) {
    $file = $_SERVER['HTTP_REFERER'];
  } else {
    $file = $_SERVER['REQUEST_URI'];
  }
  if(is_array($res)) {
    $res_real = "$error_date\t$file\n";
    error_log($res_real, 3, $address);
    $res = var_export($res,true);
    $res = $res."\n";
    error_log($res, 3, $address);
  } else {
    $res_real = "$error_date\t$file\t$res\n";
    error_log($res_real, 3, $address);
  }
}

var_export() Detailed explanation of the method:

var_export – output or return a String representation of the variable

Description:

mixed var_export (mixed expression, bool)

This function returns the information about the passed Gives the structure information of the variables of this function. It is similar to var_dump(), except that the representation returned is legal PHP code.

You can return a representation of a variable by setting the second parameter of the function to TRUE.

EG:

var_export(array('a','b',array('aa','bb','cc'))) This kind There is no difference from VAR_DUMP;

$var =var_export(array('a','b',array('aa','bb','cc')),TRUE)

After adding TRUE, it will not be printed out,

but a variable is given, so that it can be output directly ;

echo $var;

The output form at this time is similar to that printed by var_dump().

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