我有一个文件users.txt
,其中包含:
"ID" "Access" ;Expire>>26-08-2013<<
"ID" "Access" ;Expire>>27-08-2013<<
"ID" "Access" ;Expire>>28-08-2013<<
我不想检查Expire日期是否大于当前日期时间,如果是,我想在该行的开头添加分号或简单地删除该行。
到目前为止,我为此编写的代码如下:
$files = file('users.txt');
foreach ($files as $line) {
$pattern = '/>>(.*)<</';
preg_match($pattern, $line, $matches);
$expiredate = strtotime($matches[1]);
$currdate = strtotime(date('d-m-Y'));
if ($currdate > $expiredate) {
echo 'access expired... edit/delete the line<br/>';
} else {
echo 'do nothing, its ok -> switching to the next line...<br/>';
}
}
它从文件的每一行中检索"过期日期"。它还检查它是否大于当前日期,但此时我不知道如何编辑(在开头添加分号)或删除满足条件的行。
有什么建议吗?
试试这个:
$files = file('users.txt');
$new_file = array();
foreach ($files as $line) {
$pattern = '/>>(.*)<</';
preg_match($pattern, $line, $matches);
$expiredate = strtotime($matches[1]);
$currdate = strtotime(date('d-m-Y'));
if ($currdate > $expiredate) {
// For edit
$line = preg_replace('/condition/', 'replace', $line); // Edit line with replace
$new_file[] = $line; // Push edited line
//If you delete the line, do not push array and do nothing
} else {
$new_file[] = $line; // push line new array
}
}
file_put_contents('users.txt', $new_file);
若要编辑该行,请使用preg_match
并将编辑后的行推送到新数组中。
如果你想删除那一行,什么也不做。忽略。
如果要切换到下一行,请将当前行推送到新数组。
最后将new array
保存到文件中。
基本流程是:
open main file in readonly mode
open secondary (temp) file in writeonly mode
Loop: readline from main file
process the line
save to secondary file
until end of file
close both files
delete the main file
rename the secondary file.