php常用方法总结
php获取毫秒函数判断是否是https请求代码如下获取请求连接url时间戳格式化对查询结果进行排序把返回的数据集转换成Tree存储（流量）单位换算php获取中文字符拼音首字母
php获取毫秒函数
代码如下
// A code block
/*
*返回字符串的毫秒数时间戳
*/
function _get_total_millisecond()
{
$time = explode (" ", microtime () );
$time = $time [1] . ($time [0] * 1000);
$time2 = explode ( ".", $time );
$time = $time2 [0];
return $time;
}
判断是否是https请求代码如下
function is_https() {
if ( !empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off') {
return true;
} elseif ( isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https' ) {
return true;
} elseif ( !empty($_SERVER['HTTP_FRONT_END_HTTPS']) && strtolower($_SERVER['HTTP_FRONT_END_HTTPS']) !== 'off') {
return true;
}
return false;
}
获取请求连接url
function get_url() {
$sys_protocal ='https://';
$php_self = $_SERVER['PHP_SELF'] ? $_SERVER['PHP_SELF'] : $_SERVER['SCRIPT_NAME'];
$path_info = isset($_SERVER['PATH_INFO']) ? $_SERVER['PATH_INFO'] : '';
$relate_url = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : $php_self.(isset($_SERVER['QUERY_STRING']) ? '?'.$_SERVER['QUERY_STRING'] : $path_info);
return $sys_protocal.(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '').$relate_url;
}
时间戳格式化
/**
* 时间戳格式化
* @param int $time
* @return string 完整的时间显示
* @author huajie <banhuajie@163.com>
*/
function time_format($time = NULL, $format = 'Y-m-d H:i') {
$time = $time === NULL ? time() : intval($time);
return date($format, $time);
}
对查询结果进行排序
/**
* 对查询结果集进行排序
* @access public
* @param array $list 查询结果
* @param string $field 排序的字段名
* @param array $sortby 排序类型
* asc正向排序 desc逆向排序 nat自然排序
* @return array
*/
function list_sort_by($list, $field, $sortby = 'asc') {
if (is_array($list)) {
$refer = $resultSet = array();
foreach ($list as $i => $data) {
$refer[$i] = &$data[$field];
}
switch ($sortby) {
case 'asc': // 正向排序
asort($refer);
break;
case 'desc': // 逆向排序
arsort($refer);
break;
case 'nat': // 自然排序
natcasesort($refer);
break;
}
foreach ($refer as $key => $val) {
$resultSet[] = &$list[$key];
}
return $resultSet;
}
return false;
}
把返回的数据集转换成Tree
/**
* 把返回的数据集转换成Tree
* @param array $list 要转换的数据集
* @param string $pid parent标记字段
* @param string $level level标记字段
* @return array
*/
function list_to_tree($list, $pk = 'id', $pid = 'pid', $child = '_child', $root = 0) {
// 创建Tree
$tree = array();
if (is_array($list) && !is_object($list)) {
// 创建基于主键的数组引用
$refer = array();
foreach ($list as $key => $data) {
$refer[$data[$pk]] = &$list[$key];
}
foreach ($list as $key => $data) {
// 判断是否存在parent
$parentId = $data[$pid];
if ($root == $parentId) {
$tree[] = &$list[$key];
} else {
if (isset($refer[$parentId])) {
$parent = &$refer[$parentId];
$parent['childs'][] = $data['id'];
$parent[$child][] = &$list[$key];
}
}
}
}
return $tree;
}
存储（流量）单位换算
/**
* 格式化字节大小
* @param number $size 字节数
* @param string $delimiter 数字和单位分隔符
* @return string 格式化后的带单位的大小
*/
function format_bytes($size, $delimiter = '') {
$units = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');
for ($i = 0; $size >= 1024 && $i < 5; $i++) {
$size /= 1024;
}
return round($size, 2) . $delimiter . $units[$i];
}
php获取中文字符拼音首字母
//php获取中文字符拼音首字母
function getFirstCharter($s0) {
$fchar = ord($s0{0});
if ($fchar >= ord("A") and $fchar <= ord("z")) {
return strtoupper($s0{0});
}
$s1 = \iconv("UTF-8", "gb2312", $s0);
$s2 = \iconv("gb2312", "UTF-8", $s1);
if ($s2 == $s0) {$s = $s1;} else { $s = $s0;}
$asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
if ($asc >= -20319 and $asc <= -20284) {
return "A";
}
if ($asc >= -20283 and $asc <= -19776) {
return "B";
}
if ($asc >= -19775 and $asc <= -19219) {
return "C";
}
if ($asc >= -19218 and $asc <= -18711) {
return "D";
}
if ($asc >= -18710 and $asc <= -18527) {
return "E";
}
if ($asc >= -18526 and $asc <= -18240) {
return "F";
}
if ($asc >= -18239 and $asc <= -17923) {
return "G";
}
if ($asc >= -17922 and $asc <= -17418) {
return "H";
}
if ($asc >= -17417 and $asc <= -16475) {
return "J";
}
if ($asc >= -16474 and $asc <= -16213) {
return "K";
}
if ($asc >= -16212 and $asc <= -15641) {
return "L";
}
if ($asc >= -15640 and $asc <= -15166) {
return "M";
}
if ($asc >= -15165 and $asc <= -14923) {
return "N";
}
if ($asc >= -14922 and $asc <= -14915) {
return "O";
}
if ($asc >= -14914 and $asc <= -14631) {
return "P";
}
if ($asc >= -14630 and $asc <= -14150) {
return "Q";
}
if ($asc >= -14149 and $asc <= -14091) {
return "R";
}
if ($asc >= -14090 and $asc <= -13319) {
return "S";
}
if ($asc >= -13318 and $asc <= -12839) {
return "T";
}
if ($asc >= -12838 and $asc <= -12557) {
return "W";
}
if ($asc >= -12556 and $asc <= -11848) {
return "X";
}
if ($asc >= -11847 and $asc <= -11056) {
return "Y";
}
if ($asc >= -11055 and $asc <= -10247) {
return "Z";
}
return null;
}
function PyFirst($zh) {
$ret = "";
$s1 = \iconv("UTF-8", "gb2312", $zh);
$s2 = \iconv("gb2312", "UTF-8", $s1);
if ($s2 == $zh) {$zh = $s1;}
for ($i = 0; $i < strlen($zh); $i++) {
$s1 = substr($zh, $i, 1);
$p = ord($s1);
if ($p > 160) {
$s2 = substr($zh, $i++, 2);
$ret .= getFirstCharter($s2);
} else {
$ret .= $s1;
}
}
return $ret;
}
