php把数组保存为文件格式的函数实例,或许有的还没听说过可以把数组保存成文件,其实这样做也是另有它用的,两种方法各有千秋,有兴趣的PHP爱好者敬请参阅:
$file="./cache/file.cache";//定义要保存的数组文件路径、名称
$array = array("color" => array("blue", "red", "green"),
"size" => array("small", "medium", "large"));
file_put_contents($file,serialize($array));//写入缓存
//读取缓存
$handle = fopen($file, "r");
$cacheArray = unserialize(fread($handle, filesize ($file)));
下面是第二种方法,保存较麻烦,但调用很省事:
function cache_write($name, $var, $values) {
$cachefile = S_ROOT.'./data/data_'.$name.'.php';
$cachetext = "<?php\r\n".
"if(!defined('CHECK_CODE')) exit('Access Denied');\r\n".
'$'.$var.'='.arrayeval($values).
"\r\n?>";
if(!swritefile($cachefile, $cachetext)) {
exit("File: $cachefile write error.");
}
}
//数组转换成字串
function arrayeval($array, $level = 0) {
$space = '';
for($i = 0; $i <= $level; $i++) {
$space .= "\t";
}
$evaluate = "Array\n$space(\n";
$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, $level + 1);
} else {
$evaluate .= "$comma$key => $val";
}
$comma = ",\n$space";
}
$evaluate .= "\n$space)";
return $evaluate;
}
//写入文件
function swritefile($filename, $writetext, $openmod='w') {
if(@$fp = fopen($filename, $openmod)) {
flock($fp, 2);
fwrite($fp, $writetext);
fclose($fp);
return true;
} else {
runlog('error', "File: $filename write error.");
return false;
}
}
复制以上代码为:data_cache.php文件,使用时include:
@include ('data_cache.php');
//数组重新排序
sort($arrayName);
调用方法:
cache_write('file','arrayName',$array);