我目前有能力在我的网页上选择一个" to "answers" from "日期:
<script>
$(function() {
if(document.getElementById("from").type == "text") {
var maxDate = new Date();
var minDate = new Date("2012-01-01");
$("#from").datepicker({
changeMonth: true,
changeYear: true,
dateFormat: "yy-mm-dd",
defaultDate: "+1w",
maxDate: maxDate,
minDate: minDate,
numberOfMonths: 1,
showMonthAfterYear: true,
showOtherMonths: true,
selectOtherMonths: true,
onClose: function(selectedDate) {
$("#to").datepicker("option", "minDate", selectedDate);
}
});
$("#to").datepicker({
changeMonth: true,
changeYear: true,
dateFormat: "yy-mm-dd",
defaultDate: "+1w",
maxDate: maxDate,
minDate: minDate,
numberOfMonths: 1,
showMonthAfterYear: true,
showOtherMonths: true,
selectOtherMonths: true,
onClose: function(selectedDate) {
$("#from").datepicker("option", "maxDate", selectedDate);
}
});
}
else {
$("#from").on("change", function() {
$("#to").prop("min", $(this).val());
});
$("#to").on("change", function(){
$("#from").prop("max", $(this).val());
});
}
});
</script>
<form action="" form method="post">
<input type="checkbox" checked="checked" value="Select dates?" name="dates"/>
Search Between Dates? (only available if 'Finished' is selected)
<label for="from">From:</label>
<input id="from" name="from" type="date" value="2015-05-25"/>
</div>
<label for="to">To:</label>
<input id="to" name="to" type="date" value="2015-06-24"/>
</form>
我想知道我是否可以使用from和from框中的条目来搜索文本文件中两者之间的任何日期。我的文本文件看起来像这样(有很多条目)第一列是日期:
20150619 finished 17772 resolved philw Current/17772 -
20150619 finished 17751 resolved peters Current/17751 -
20150619 finished 17594 resolved peters Current/17594 -
unfinished unfinished 16218 open allanm Current/16218 -
unfinished unfinished 15918 open allanm Current/15918 -
得到了一个答案:
// Set $fromdate to the entered value if there was one, otherwise set it to something long ago
$fromdate = $_REQUEST["from"] ? $_REQUEST["from"] : date("Y-m-d", strtotime("-100 years"));
// Set $todate to the entered value if there was one, otherwise set it to tomorrow. There shouldn't be any finished dates in the future!
$todate = $_REQUEST["to"] ? $_REQUEST["to"]: date("Y-m-d", strtotime("+1 day"));
// Remove the hyphens so that our dates are in the same format as the text file and we can compare them directly
$fromdate = str_replace("-", "", $fromdate);
$todate = str_replace("-", "", $todate);
$handle = @fopen("project-list.txt", "r");
while(!feof($handle)) {
$row = fgets($handle);
$col1 = explode ("'t", $row);
if(($col1 != "unfinished") && ($col1 >= $fromdate) && ($col1 <= $todate))
// Or save the $row in an array to write out later
echo $row;
}
fclose($handle);
}
答案取决于您是否能够保证文本文件中的日期始终按特定顺序排序。一种方法是逐行读取文件，直到找到匹配的开始日期，并继续存储连续的行，直到到达结束日期或文件的末尾。如果文件没有排序，另一种方法是将文件中的所有行加载到数组中并按日期排序。
排序文件方法
$collect = false;
$n = 1;
$file = 'myfile.txt';
$fp = fopen($file, 'r');
$data = [];
while($line = fgets($fp)) {
list($date, $data) = explode("'t", $line, 2); // assumption of tab delimiter
try {
$date = DateTime::createFromFormat('!Ymd', $date);
} catch(Exception $e) {
echo "Encountered bad date form on line $n in $file!'n";
}
if ($date == $to) {
$collect = true;
}
if ($date == $from) {
break;
}
if ($collect) {
$data[] = $line;
}
$n++;
}
// do whatever with $data here
未排序文件方法
$fileName = 'myfile.txt';
$data = file($fileName);
$data = array_map(function($line) {
list($date, $data) = explode("'t", $line);
$date = DateTime::createFromFormat('!Ymd', $date);
return ['date' => $date->getTimestamp(), 'line' => $line];
}, $data);
usort($data, function($a, $b) {
if ($a['date'] < $b['date']) {
return -1;
} elseif ($a['date'] > $b['date']) {
return 1;
} else {
return 0;
}
});
$data = array_filter($data, function($v) use($to, $from) {
return $v['date'] >= $to && $v['date'] <= $from;
});
// Anything left in $data at this point is between $to and $from