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Three ways to store arrays as text files in php

墨辰丷
墨辰丷Original
2018-06-06 15:23:514457browse

本篇文章主要介绍php将数组存储为文本文件的三种方法,感兴趣的朋友参考下,希望对大家有所帮助。

(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

<?php 
$file=&#39;./cache/phone.php&#39;; 
$array=array(&#39;color&#39;=> array(&#39;blue&#39;,&#39;red&#39;,&#39;green&#39;),&#39;size&#39;=> array(&#39;small&#39;,&#39;medium&#39;,&#39;large&#39;)); 
//缓存 
if(false!==fopen($file,&#39;w+&#39;)){ 
  file_put_contents($file,serialize($array));//写入缓存 
} 
//读出缓存 
$handle=fopen($file,&#39;r&#39;); 
$cacheArray=unserialize(fread($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

<?php 
$file=&#39;./cache/phone.php&#39;; 
$array=array(&#39;color&#39;=> array(&#39;blue&#39;,&#39;red&#39;,&#39;green&#39;),&#39;size&#39;=> array(&#39;small&#39;,&#39;medium&#39;,&#39;large&#39;)); 
cache_write($file,$array,&#39;rows&#39;,false); 
 
//写入 
function cache_write($filename,$values,$var=&#39;rows&#39;,$format=false){ 
  $cachefile=$filename; 
  $cachetext="<?php\r\n".&#39;$&#39;.$var.&#39;=&#39;.arrayeval($values,$format).";"; 
  return writefile($cachefile,$cachetext); 
} 
 
//数组转换成字串 
function arrayeval($array,$format=false,$level=0){ 
  $space=$line=&#39;&#39;; 
  if(!$format){ 
    for($i=0;$i<=$level;$i++){ 
      $space.="\t"; 
    } 
    $line="\n"; 
  } 
  $evaluate=&#39;Array&#39;.$line.$space.&#39;(&#39;.$line; 
  $comma=$space; 
  foreach($array as $key=> $val){ 
    $key=is_string($key)?&#39;\&#39;&#39;.addcslashes($key,&#39;\&#39;\\&#39;).&#39;\&#39;&#39;:$key; 
    $val=!is_array($val)&&(!preg_match(&#39;/^\-?\d+$/&#39;,$val)||strlen($val) > 12)?&#39;\&#39;&#39;.addcslashes($val,&#39;\&#39;\\&#39;).&#39;\&#39;&#39;:$val; 
    if(is_array($val)){ 
      $evaluate.=$comma.$key.&#39;=>&#39;.arrayeval($val,$format,$level+1); 
    }else{ 
      $evaluate.=$comma.$key.&#39;=>&#39;.$val; 
    } 
    $comma=&#39;,&#39;.$line.$space; 
  } 
  $evaluate.=$line.$space.&#39;)&#39;; 
  return $evaluate; 
} 
 
//写入文件 
function writefile($filename,$writetext,$openmod=&#39;w&#39;){ 
  if(false!==$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

<?php 
$file=&#39;./cache/phone.php&#39;; 
$array=array(&#39;color&#39;=> array(&#39;blue&#39;,&#39;red&#39;,&#39;green&#39;),&#39;size&#39;=> array(&#39;small&#39;,&#39;medium&#39;,&#39;large&#39;)); 
//缓存 
$text=&#39;<?php $rows=&#39;.var_export($array,true).&#39;;&#39;; 
if(false!==fopen($file,&#39;w+&#39;)){ 
  file_put_contents($file,$text); 
}else{ 
  echo &#39;创建失败&#39;; 
}

总结:以上就是本篇文的全部内容,希望能对大家的学习有所帮助。

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