PHP implements log recording method based on custom functions

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

/**
 * 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() Method details:

var_export – Output or return a string representation of a variable

Description:

mixed var_export (mixed expression, bool)

This function returns structural information about the variables passed to the 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 TRUE is added, it will not be printed out anymore,

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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