/**
* 读取文件特定行
* @param type $filename
* @param type $startLine
* @param type $endLine
* @param type $method
* @return array
*/
protected function getFileLines(
$filename,
$startLine = 1,
$endLine = 50,
$method = 'rb'
) {
$content =
array();
$count =
$endLine -
$startLine;
$fp =
fopen(
$filename,
$method);
if (!
$fp)
return $content;
for (
$i = 1;
$i <
$startLine; ++
$i) {
// 跳过前$startLine行
fgets(
$fp);
}
for (
$i =
$startLine;
$i <=
$endLine; ++
$i) {
$content[] =
fgets(
$fp);
// 读取文件行内容
}
fclose(
$fp);
$content =
array_filter(
$content);
// array_filter过滤：false,null,''
foreach (
$content as $key =>
$value) {
$content[
$key] = json_decode(
$value,
true);
}
return $content;
}
/**
* 获取文件有多少行
* @param type $file
* @return type
*/
protected function count_line(
$file) {
$fp =
fopen(
$file, "r"
);
$i = 0
;
while (!
feof(
$fp)) {
//每次读取2M
if (
$data =
fread(
$fp, 1024 * 1024 * 2
)) {
//计算读取到的行数
$num =
substr_count(
$data, "\n"
);
$i+=
$num;
}
}
fclose(
$fp);
return $i;
}
转载于:https://www.cnblogs.com/bandbandme/p/6675030.html
