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
<?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
<?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; $cachetext="<?php\r\n".'$'.$var.'='.arrayeval($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)?'\''.addcslashes($key,'\'\\').'\'':$key; $val=!is_array($val)&&(!preg_match('/^\-?\d+$/',$val)||strlen($val) > 12)?'\''.addcslashes($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
<?php $file='./cache/phone.php'; $array=array('color'=> array('blue','red','green'),'size'=> array('small','medium','large')); //缓存 $text='<?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。

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