Home >Backend Development >PHP Tutorial >Summary of methods of storing arrays as text files in php, _PHP tutorial

Summary of methods of storing arrays as text files in php, _PHP tutorial

WBOY
WBOYOriginal
2016-07-12 09:06:19801browse

php将数组存储为文本文件方法汇总,

php 缓存数组形式的变量,实际上就是将 php 将数组写入到一个文本文件或者后缀名为 .php 存储起来,使用的时候直接调用这个文件。那么如何使用 php 将数组保存为文本格式的文件呢?下面分享三种方法实现将 php 数组写入到文件以缓存数组。
(1)利用serialize 将数组序列化存储为文本文件,调用时候再使用unserialize 还原

<&#63;php 
$file='./cache/phone.php'; 
$array=array('color'=> array('blue','red','green'),'size'=> array('small','medium','large')); 
//缓存 
if(false!==fopen($file,'w+')){ 
  file_put_contents($file,serialize($array));//写入缓存 
} 
//读出缓存 
$handle=fopen($file,'r'); 
$cacheArray=unserialize(fread($handle,filesize($file))); 

(2)自创的将数组保存为标准的数组格式,虽然保存时复杂了点但是调用时简单

<&#63;php 
$file='./cache/phone.php'; 
$array=array('color'=> array('blue','red','green'),'size'=> array('small','medium','large')); 
cache_write($file,$array,'rows',false); 
 
//写入 
function cache_write($filename,$values,$var='rows',$format=false){ 
  $cachefile=$filename; 
  $cachetext="<&#63;php\r\n".'$'.$var.'='.arrayeval($values,$format).";"; 
  return writefile($cachefile,$cachetext); 
} 
 
//数组转换成字串 
function arrayeval($array,$format=false,$level=0){ 
  $space=$line=''; 
  if(!$format){ 
    for($i=0;$i<=$level;$i++){ 
      $space.="\t"; 
    } 
    $line="\n"; 
  } 
  $evaluate='Array'.$line.$space.'('.$line; 
  $comma=$space; 
  foreach($array as $key=> $val){ 
    $key=is_string($key)&#63;'\''.addcslashes($key,'\'\\').'\'':$key; 
    $val=!is_array($val)&&(!preg_match('/^\-&#63;\d+$/',$val)||strlen($val) > 12)&#63;'\''.addcslashes($val,'\'\\').'\'':$val; 
    if(is_array($val)){ 
      $evaluate.=$comma.$key.'=>'.arrayeval($val,$format,$level+1); 
    }else{ 
      $evaluate.=$comma.$key.'=>'.$val; 
    } 
    $comma=','.$line.$space; 
  } 
  $evaluate.=$line.$space.')'; 
  return $evaluate; 
} 
 
//写入文件 
function writefile($filename,$writetext,$openmod='w'){ 
  if(false!==$fp=fopen($filename,$openmod)){ 
    flock($fp,2); 
    fwrite($fp,$writetext); 
    fclose($fp); 
    return true; 
  }else{ 
    return false; 
  } 
} 

(3)利用 var_export 将数组直接保存为数组形式存储到文本文件中

<&#63;php 
$file='./cache/phone.php'; 
$array=array('color'=> array('blue','red','green'),'size'=> array('small','medium','large')); 
//缓存 
$text='<&#63;php $rows='.var_export($array,true).';'; 
if(false!==fopen($file,'w+')){ 
  file_put_contents($file,$text); 
}else{ 
  echo '创建失败'; 
} 

以上就是为大家介绍的三种php将数组保存为文本格式的方法,希望对大家的学习有所帮助。

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/1065568.htmlTechArticlephp将数组存储为文本文件方法汇总, php 缓存数组形式的变量,实际上就是将 php 将数组写入到一个文本文件或者后缀名为 .php 存储起来,使...
Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn