PHP常用方法集合
/**
* 系统加密方法
* @param string $data 要加密的字符串
* @param string $key 加密密钥
* @param int $expire 过期时间 单位 秒
* @return string
*/
function think_encrypt ($data, $key = '', $expire = 0)
{
$key = md5 ( empty( $key ) ? config ( 'data_auth_key' ) : $key );
$data = base64_encode ( $data );
$x = 0;
$len = strlen ( $data );
$l = strlen ( $key );
$char = '';
for ( $i = 0; $i < $len; $i++ ) {
if ( $x == $l ) $x = 0;
$char .= substr ( $key, $x, 1 );
$x++;
}
$str = sprintf ( '%010d', $expire ? $expire + time () : 0 );
for ( $i = 0; $i < $len; $i++ ) {
$str .= chr ( ord ( substr ( $data, $i, 1 ) ) + ( ord ( substr ( $char, $i, 1 ) ) ) % 256 );
}
return str_replace ( ['+', '/', '='], ['-', '_', ''], base64_encode ( $str ) );
}
/**
* 系统解密方法
* @param string $data 要解密的字符串 （必须是think_encrypt方法加密的字符串）
* @param string $key 加密密钥
* @return string
*/
function think_decrypt ($data, $key = '')
{
$key = md5 ( empty( $key ) ? config ( 'data_auth_key' ) : $key );
$data = str_replace ( ['-', '_'], ['+', '/'], $data );
$mod4 = strlen ( $data ) % 4;
if ( $mod4 ) {
$data .= substr ( '====', $mod4 );
}
$data = base64_decode ( $data );
$expire = substr ( $data, 0, 10 );
$data = substr ( $data, 10 );
if ( $expire > 0 && $expire < time () ) {
return '';
}
$x = 0;
$len = strlen ( $data );
$l = strlen ( $key );
$char = $str = '';
for ( $i = 0; $i < $len; $i++ ) {
if ( $x == $l ) $x = 0;
$char .= substr ( $key, $x, 1 );
$x++;
}
for ( $i = 0; $i < $len; $i++ ) {
if ( ord ( substr ( $data, $i, 1 ) ) < ord ( substr ( $char, $i, 1 ) ) ) {
$str .= chr ( ( ord ( substr ( $data, $i, 1 ) ) + 256 ) - ord ( substr ( $char, $i, 1 ) ) );
} else {
$str .= chr ( ord ( substr ( $data, $i, 1 ) ) - ord ( substr ( $char, $i, 1 ) ) );
}
}
return base64_decode ( $str );
}
/**
* 生成随机验证码，每一位都是单独从字典中随机获取的字符，字典是0-9纯数字。
* @param int $length 默认长度6
* @return string
*/
function create_random_code ($length = 6)
{
$chars = "0123456789";
$str = "";
for ( $i = 0; $i < $length; $i++ ) {
$str .= substr ( $chars, mt_rand ( 0, strlen ( $chars ) - 1 ), 1 );
}
return $str;
}/**
* 校验手机格式
* @param $phone
* @return int
*/
function check_mobile ($phone)
{
return preg_match ( "/1\d{10}$/", $phone );
}/**
* [check_email 校验邮箱格式]
*/
function check_email ($email)
{
$pattern = "/^([0-9A-Za-z\\-_\\.]+)@([0-9a-z]+\\.[a-z]{2,3}(\\.[a-z]{2})?)$/i";
return preg_match ( $pattern, $email );
/**
* 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 = [];
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
* @param array $list 要转换的数据集
* @param string $pid parent标记字段
* @return array
*/
function list_to_tree ($list, $pk = 'id', $pid = 'pid', $child = '_child', $root = 0)
{
// 创建Tree
$tree = [];
if ( is_array ( $list ) ) {
// 创建基于主键的数组引用
$refer = [];
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[ $child ][] =& $list[ $key ];
}
}
}
}
return $tree;
}/**
* 压缩文件/目录成zip
* @param $path
* @param $zip
*/
function add_file_to_zip ($path, $zip)
{
$handler = opendir ( $path ); //打开当前文件夹由$path指定。
while (( $filename = readdir ( $handler ) ) !== false) {
if ( $filename != "." && $filename != ".." ) {//文件夹文件名字为'.'和‘..’，不要对他们进行操作
if ( is_dir ( $path . "/" . $filename ) ) {// 如果读取的某个对象是文件夹，则递归
add_file_to_zip ( $path . "/" . $filename, $zip );
} else { //将文件加入zip对象
$pp = $path . "/" . $filename;
$pps = explode ( '//', $pp );
$zip->addFile ( $pp, $pps[ 1 ] );
}
}
}
@closedir ( $path );
}/**
* zip解压
* @param $filename 要解压的文件
* @param $path 解压的路径
* @return bool
*/
function get_zip_originalsize ($filename, $path)
{
//先判断待解压的文件是否存在
if ( !file_exists ( $filename ) ) {
return false;
}
//将文件名和路径转成windows系统默认的gb2312编码，否则将会读取不到
$filename = iconv ( "utf-8", "gb2312", $filename );
$path = iconv ( "utf-8", "gb2312", $path );
//打开压缩包
$resource = zip_open ( $filename );
//遍历读取压缩包里面的一个个文件
while ($dir_resource = zip_read ( $resource )) {
//如果能打开则继续
if ( zip_entry_open ( $resource, $dir_resource ) ) {
//获取当前项目的名称,即压缩包里面当前对应的文件名
$file_name = $path . zip_entry_name ( $dir_resource );
$file_name = str_replace ( '/', DS, $file_name );
//以最后一个“/”分割,再用字符串截取出路径部分
$file_path = substr ( $file_name, 0, strrpos ( $file_name, DS ) );
//如果路径不存在，则创建一个目录，true表示可以创建多级目录
if ( !is_dir ( $file_path ) ) {
mkdir ( $file_path, 0777, true );
}
//如果不是目录，则写入文件
if ( !is_dir ( $file_name ) ) {
//读取这个文件
$file_size = zip_entry_filesize ( $dir_resource );
//最大读取6M，如果文件过大，跳过解压，继续下一个
if ( $file_size < ( 1024 * 1024 * 30 ) ) {
$file_content = zip_entry_read ( $dir_resource, $file_size );
trace ( $file_name );
$rr = file_put_contents ( $file_name, $file_content );
if ( $rr === false ) {
return false; //写入文件失败
}
} else {
return false; //文件过大
}
}
//关闭当前
zip_entry_close ( $dir_resource );
}
}
//关闭压缩包
zip_close ( $resource );
return true;
}/**
* 清空文件夹及文件夹下的所有文件
* @param $path "./code/"
*/
function deldir ($path)
{
//如果是目录则继续
if ( is_dir ( $path ) ) {
//扫描一个文件夹内的所有文件夹和文件并返回数组
$p = scandir ( $path );
foreach ( $p as $val ) {
//排除目录中的.和..
if ( $val != "." && $val != ".." ) {
//如果是目录则递归子目录，继续操作
if ( is_dir ( $path . $val ) ) {
//子目录中操作删除文件夹和文件
deldir ( $path . $val . '/' );
//目录清空后删除空文件夹
@rmdir ( $path . $val . '/' );
} else {
//如果是文件直接删除
@unlink ( $path . $val );
}
}
}
@rmdir ( $path );
}
}/**
* @param $user_id
* @return string
* 创建推荐码
*/
function createcode ($user_id)
{
static $source_string = 'E5FCDG3HQA4BNPJ2RSTUV67MWX9KYZ';
$num = $user_id;
$code = '';
while ($num > 0) {
$mod = $num % 30;
$num = ( $num - $mod ) / 30;
$code = $source_string[ $mod ] . $code;
}
if ( empty( $code[ 3 ] ) )
$code = str_pad ( $code, 4, '8', STR_PAD_LEFT );
return $code;
}
/**
* @param $code
* @return bool|int
* 由推荐码获取用户id
*/
function decode ($code)
{
static $source_string = 'E5FCDG3HQA4BNPJ2RSTUV67MWX9KYZ';
if ( strrpos ( $code, '8' ) !== false )
$code = substr ( $code, strrpos ( $code, '8' ) + 1 );
$len = strlen ( $code );
$code = strrev ( $code );
$num = 0;
for ( $i = 0; $i < $len; $i++ ) {
$num += strpos ( $source_string, $code[ $i ] ) * pow ( 30, $i );
}
return $num;
}
/**
* 输入特殊字符过滤
* @param $str
* @return string
*/
function str_filter ($str)
{
if ( empty ( $str ) || "" == $str ) {
return "";
}
$str = strip_tags ( $str );
$str = htmlspecialchars ( $str );
$str = nl2br ( $str );
return trim ( $str );
}/**
* 格式化富文本内容
* @param $content
* @return mixed
*/
function format_editor ($content)
{
$content = htmlspecialchars_decode ( $content );
//富文本图片路径加上域名
preg_match_all ( '/<img[^>]*src\s*=\s*([\'"]?)([^\'" >]*)\1/isu', $content, $src );
foreach ( $src[ 2 ] as $key => $value ) {
$pos1 = strpos ( $value, 'http://' );
$pos2 = strpos ( $value, 'https://' );
if ( $pos1 === false && $pos2 === false ) {
$host = config ( 'site_root' );
$res = str_replace ( $value, $host . $value, $content );
$content = $res;
}
}
//图片最大样式设置
preg_match_all ( '/<\s*img\s+[^>]*?src\s*=\s*(\'|\")(.*?)\\1[^>]*?\/?\s*>/i', $content, $src1 ); //匹配所以img标签
foreach ( $src1[ 0 ] as $k => $v ) {
preg_match_all ( '/<img[^>]*style\s*=\s*([\'"]?)([^\'" >]*)\1/isu', $v, $src );
if ( count ( $src[ 2 ] ) > 0 ) {
foreach ( $src[ 2 ] as $key => $value ) {
$style = 'style=' . $src[ 1 ][ $key ] . $value . $src[ 1 ][ $key ];
$style1 = 'style=' . $src[ 1 ][ $key ] . $value . ';max-width:100%;' . $src[ 1 ][ $key ];
$res = str_replace ( $style, $style1, $v );
$content = str_replace ( $v, $res, $content );
}
} else {
$style1 = '<img style="max-width:100%"';
$res = str_replace ( '<img', $style1, $v );
$content = str_replace ( $v, $res, $content );
}
}
$content = str_replace ( '<p>', '<p style="word-break:break-all;">', $content ); //解决长英文单词不换行问题
return $content;
} /**
* $time 时间戳
* return string
*/
function T ($time)
{
$time = intval ( $time );
$nowTime = time ();
$t = $nowTime - $time;// 时间差
if ( $t <= 10 ) {
$str = '刚刚';
} else if ( $t > 10 && $t <= 60 ) {
$str = $t . '秒内';
} else if ( $t > 60 && $t <= 60 * 60 ) {
$str = floor ( $t / 60 ) . '分钟前';
} else if ( $t > 60 * 60 && $t <= 60 * 60 * 24 ) {
$str = floor ( $t / ( 60 * 60 ) ) . '小时前';
} else if ( $t > 60 * 60 * 24 && $t <= 60 * 60 * 24 * 7 ) {
$str = floor ( $t / ( 60 * 60 * 24 ) ) . '天前';
} else if ( $t > 60 * 60 * 24 * 7 && $t <= 60 * 60 * 24 * 7 * 4 ) {
$str = floor ( $t / ( 60 * 60 * 24 * 7 ) ) . '周前';
} else if ( $t > 60 * 60 * 24 * 7 * 4 && $t <= 60 * 60 * 24 * 365 ) {
$nowM = date ( 'm', $nowTime );
$m = date ( 'm', $time );
if ( $nowM < $m ) {
$str = ( 12 - $m ) + $nowM . '个月前';
} else {
$str = $nowM - $m . '个月前';
}
} else if ( $t > 60 * 60 * 24 * 365 ) {
$str = date ( 'Y', $nowTime ) - date ( 'Y', $time ) . '年前';
}
return $str;
} /**
* 复制文件夹
* @param string $source 源文件夹
* @param string $dest 目标文件夹
*/
function copydirs($source, $dest)
{
if (!is_dir($dest)) {
mkdir($dest, 0755, true);
}
foreach (
$iterator = new RecursiveIteratorIterator(
new RecursiveDirectoryIterator($source, RecursiveDirectoryIterator::SKIP_DOTS),
RecursiveIteratorIterator::SELF_FIRST
) as $item
) {
if ($item->isDir()) {
$sontDir = $dest . DS . $iterator->getSubPathName();
if (!is_dir($sontDir)) {
mkdir($sontDir, 0755, true);
}
} else {
copy($item, $dest . DS . $iterator->getSubPathName());
}
}
} /**
* 删除文件夹
* @param string $dirname 目录
* @param bool $withself 是否删除自身
* @return boolean
*/
function rmdirs($dirname, $withself = true)
{
if (!is_dir($dirname)) {
return false;
}
$files = new RecursiveIteratorIterator(
new RecursiveDirectoryIterator($dirname, RecursiveDirectoryIterator::SKIP_DOTS),
RecursiveIteratorIterator::CHILD_FIRST
);
foreach ($files as $fileinfo) {
$todo = ($fileinfo->isDir() ? 'rmdir' : 'unlink');
$todo($fileinfo->getRealPath());
}
if ($withself) {
@rmdir($dirname);
}
return true;
} /**
* 判断文件或文件夹是否可写
* @param string $file 文件或目录
* @return bool
*/
function is_really_writable($file)
{
if (DIRECTORY_SEPARATOR === '/') {
return is_writable($file);
}
if (is_dir($file)) {
$file = rtrim($file, '/') . '/' . md5(mt_rand());
if (($fp = @fopen($file, 'ab')) === false) {
return false;
}
fclose($fp);
@chmod($file, 0777);
@unlink($file);
return true;
} elseif (!is_file($file) or ($fp = @fopen($file, 'ab')) === false) {
return false;
}
fclose($fp);
return true;
} /**
* 生成订单号
*/
function orNum()
{
$code = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J');
$osn = $code[intval(date('Y')) - 2011] . strtoupper(dechex(date('m'))) . date('d') . substr(time(), -5) . substr(microtime(), 2, 5) . sprintf('%02d', rand(0, 99));
return $osn;
} /**
*作用：用于取出二维数组指定元素组
*$array:[['id'=>1,'name'=>'aaa','age'=>18],['id'=>2,'name'=>'bbb','age'=>24],['id'=>3,'name'=>'ccc','age'=>35]]
*$index:'id'
* $value:2
* return:
* $type=1:['id'=>2,'name'=>'bbb','age'=>24];
* $type=2:[['id'=>2,'name'=>'bbb','age'=>24]];
*/
function filter_by_value ($array, $index, $value,$type=1){
$newarray = array();
if(is_array($array) && count($array)>0)
{
foreach(array_keys($array) as $key){
$temp[$key] = $array[$key][$index];
if ($temp[$key] == $value){
if ($type==1){
$newarray = $array[$key];
}else{
$newarray[] = $array[$key];
}
}
}
}
return $newarray;
}//搜索和高亮字符串中的关键字
function highlighter_text($text, $words){ $split_words = explode( " " , $words ); $color = "red"; foreach($split_words as $word) { $text = preg_replace("|($word)|Ui" , "<span style=\"color:".$color.";\"><b>$1</b></span>" , $text ); } return $text; } $string = "我是一个程序员小白"; $words = "我 小白"; echo highlighter_text($string ,$words);
/**
* 通用排序 （上移下移）
* @param $ids //排序的数组 11,10,9,25,8(改变后的顺序)
* @param $changeid //拖动的记录ID 8
* @param $field //操作字段 sort
* @param $table //操作的数据表
* @param $pk //主键
* @param $orderway //排序的方式
*/
public function sort($ids,$changeid,$field='sort',$table,$pk='id',$orderway='DESC')
{
$sour = $weighdata = [];
$prikey = $pk ;
$list = $this->db->query("select {$prikey},{$field} from {$table} where {$prikey} in ({$ids}) order by {$field} {$orderway}")->result_array();
foreach ($list as $k => $v) {
$sour[] = $v[$prikey];
$weighdata[$v[$prikey]] = $v[$field];
}
$position = array_search($changeid, explode(',',$ids)); //3
$desc_id = $sour[$position];
$sour_id = $changeid;
$weighids = array();
$temp = array_values(array_diff_assoc( explode(',',$ids), $sour));//[8,25]
$sql = "UPDATE {$table} SET {$field}= CASE id ";
foreach ($temp as $m => $n) {
if ($n == $sour_id) {
$offset = $desc_id;
} else {
if ($sour_id == $temp[0]) {
$offset = isset($temp[$m + 1]) ? $temp[$m + 1] : $sour_id;
} else {
$offset = isset($temp[$m - 1]) ? $temp[$m - 1] : $sour_id;
}
}
$weighids[$n] = $weighdata[$offset];
$sql .= sprintf("WHEN %d THEN %d ", $n, $weighdata[$offset]);
}
$up_ids = implode(',', array_keys($weighids));
$sql .= "END WHERE id IN ($up_ids)";
$this->db->query($sql);
}
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