4.替换a标签内容，防止标签内容超长被截断
5.wordwrap方法处理字符串自动换行。（）
在实际项目中发现换行符必须为\r\n
(在windows情况下实际测试，网上很多都说为\n\r，个人感觉是说错了)，
所以必须要规定wordwrap方法的替换参数，注意在替换格式后添加空格是为了有些邮件客户端（outlook）可以正常解析换行的属性标签，有些则不能（foxmail）
如截断后标签换行 tr和span中间有换行符，无空格。
span='3'>
6.替换回a标签内容
ps1：改造后邮件处理方法
//邮件文本替换
function __mailreplace($content, $type) {
//替换回车换行符（注意替换字符串后添加 空格，以便在wordwrap方法中可以将字符串换行）
if (strtolower ( $type ) == "html") {
$content = ltrim ( $content );
$content = str_replace ( array ('\n', '\r\n' ), "<br/> ", $content );
$content = str_replace ( array (chr ( 13 ), chr ( 13 ) . chr ( 10 ) ), "<br/> ", $content );
//替换空格
$content = str_replace ( " ", " ", $content );
//处理表格过长问题，将每行换行
$content = str_replace ( "</tr>", "</tr> ", $content );
} else {
$content = str_replace ( array ("<br>", "<br/>" ), "\r\n", $content );
$content = str_replace ( " ", " ", $content );
//替换多余空格
$content = preg_replace ( "| +|", " ", $content );
//替换a标签（防止链接过长被截断）
$unwrap = array ();
if (preg_match_all ( '|(<a.*>.*</a>)|U', $content, $matches )) {
for($i = 0; $i < count ( $matches ['0'] ); $i ++) {
$unwrap [] = $matches ['1'] [$i];
$content = str_replace ( $matches ['1'] [$i], "{{a-link" . $i . "}}", $content );
//过长字符串自动换行（添加空格，避免html标签内属性换行时无法正常解析）
$content = wordwrap ( $content, 75, "\r\n ", FALSE );
//替换回a标签
if (count ( $unwrap ) > 0) {
foreach ( $unwrap as $key => $val ) {
$content = str_replace ( "{{a-link" . $key . "}}", $val, $content );
return $content;
ps3：codeigniter源码：
public function word_wrap($str, $charlim = '') {
// Se the character limit
if ($charlim == '') {
$charlim = ($this->wrapchars == "") ? "76" : $this->wrapchars;
// Reduce multiple spaces 去除多余空格
$str = preg_replace ( "| +|", " ", $str );
// Standardize newlines 替换回车 换行符
if (strpos ( $str, "\r" ) !== FALSE) {
$str = str_replace ( array ("\r\n", "\r" ), "\n", $str );
// If the current word is surrounded by {unwrap} tags we'll
// strip the entire chunk and replace it with a marker. 批量替换特定标签（改为批量替换a链接）
$unwrap = array ();
if (preg_match_all ( "|(\{unwrap\}.+?\{/unwrap\})|s", $str, $matches )) {
for($i = 0; $i < count ( $matches ['0'] ); $i ++) {
$unwrap [] = $matches ['1'] [$i];
$str = str_replace ( $matches ['1'] [$i], "{{unwrapped" . $i . "}}", $str );
// Use PHP's native public function to do the initial wordwrap.
// We set the cut flag to FALSE so that any individual words that are
// too long get left alone. In the next step we'll deal with them.
// 截断字符串
$str = wordwrap ( $str, $charlim, "\n", FALSE );
// Split the string into individual lines of text and cycle through them
$output = "";
foreach ( explode ( "\n", $str ) as $line ) {
// Is the line within the allowed character count?
// If so we'll join it to the output and continue
if (strlen ( $line ) <= $charlim) {
$output .= $line . $this->newline;
continue;
$temp = '';
while ( (strlen ( $line )) > $charlim ) {
// If the over-length word is a URL we won't wrap it
if (preg_match ( "!\[url.+\]|://|wwww.!", $line )) {
break;
// Trim the word down
$temp .= substr ( $line, 0, $charlim - 1 );
$line = substr ( $line, $charlim - 1 );
// If $temp contains data it means we had to split up an over-length
// word into smaller chunks so we'll add it back to our current line
if ($temp != '') {
$output .= $temp . $this->newline . $line;
} else {
$output .= $line;
$output .= $this->newline;
// Put our markers back
// 将替换字符串替换回来
if (count ( $unwrap ) > 0) {
foreach ( $unwrap as $key => $val ) {
$output = str_replace ( "{{unwrapped" . $key . "}}", $val, $output );
return $output;
basemap python 轨迹图 python轨迹绘制
文件和数据格式化练习内容1、 自动轨迹绘制 需求：根据脚本来绘制图形 不是写代码而是写数据库绘制轨迹"""
数据接口定义：
一行共六个数据，用逗号分隔，表示一次操作
第一个数据表示行进距离
第二个数据表示转向判断，0：左转 1：右转
第三个数据表示转向的角度
后三个数据表示RGB三个通道颜色值（小数值模式）
import turtle as t
t.title("自动轨迹绘制")
python 编译 fpic python 编译pyc
生成单个pyc文件
python就是个好东西，它提供了内置的类库来实现把py文件编译为pyc文件，这个模块就是 py_compile 模块。
使用方法非常简单，如下所示，直接在idle中，就可以把一个py文件编译为pyc文件了。(假设在windows环境下)
