CH5---php从入门到精通

<?php
header("Content-type:text/html;charset=utf8");

echo "<br/>-------------------------<br/>";
echo "fruit\rpear\napple\tbanana";//linux和widows有区别的;
echo "<br/>-----------自动转义字符;--------------<br/>";
$str = "select * from tb_book where bookname='PHP从入门到精通'";
echo $str."<br/>";
$a = addslashes($str);
echo $a."<br/>";
$b = stripslashes($a);
echo $b;
echo "<br/>-----------对指定字符串转义-这个用法仅限于开始结束都包含里面？-------------<br/>";
$a = "编程体验网";
echo $a;
echo "<br/>";
$b = addcslashes($a,"编程体验网");
echo $b;
echo "<br/>";
$c = stripcslashes($b);
echo $c;

echo "<br/>-------------------------<br/>";
echo strlen("编程:www.bcty365.com");
echo "<br/>------------substr-------------<br/>";
echo substr("She is a girl",0);
echo "<br/>";
echo substr("She is a girl",4,14);
echo "<br/>";
echo substr("She is a girl",-4,4);//从-4向后截取4位;
echo "<br/>";
echo substr("She is a girl",0,-4);//从0 到 -4位置的截取
echo "<br/>";

echo "<br/>----------strcmp按照字节比较字符串大小---------------<br/>";
$str1 = "明日编程词典";
$str2 = "明日编程词典";
$str3 = "mrsoft";
$str4 = "MRSOFT";
echo strcmp($str1,$str2);
echo strcmp($str3,$str4);
echo strcasecmp($str3,$str4);//不用区分大小写;
echo "<br/>---------strnatcmp按照字符串中数字大小比较;----------------<br/>";
$str1 = "str2.jpg";
$str2 = "str10.jpg";
$str3 = "mrsoft1";
$str4 = "MRSOFT2";
echo strcmp($str1,$str2);
echo strcmp($str3,$str4);
echo strnatcmp($str1,$str2);
echo strnatcmp($str3,$str4);
echo "<br/>-----------strncmp在指定位置比较大小;--------------<br/>";
$str1 = "I like PHP!";
$str2 = "i an fine !";
echo strncmp($str1,$str2,2);
echo "<br/>----------strstr---------------<br/>";
$str = "ioewio.ew.jpg";
echo strstr($str,'.');
echo "<br/>";
echo strchr($str,'.');
echo "<br/>--------substr_count字符串中某字符串出现的次数;-----------------<br/>";
$str = "明日编程词典词";
echo substr_count($str,"词");
echo "<br/>----------str_ireplace(search, replace, subject)---------------<br/>";
$contents = "白领女子公寓，温馨街南行200米，交通便利，亲情化专人管理，您的理想选择！";
$str="女子公寓";
echo str_replace($str,"<font color='#FF0000'>".$str."</font>",$contents);
echo "<br/>----------substr_replace---书中gb的编码一个汉字占2个字符，这3个------------<br/>";
//header("Content-type:text/html;charset=gb2312");

$str = "用今日的辛勤工作，换明日的双倍回报！";
$replace = "百倍";
echo strlen($replace);//书中gb的编码一个汉字占2个字符，这3个;
echo substr_replace($str, $replace,39,6);
echo "<br/>-----------number_format--------------<br/>";
$num = 1868.954;
echo number_format($num);
echo "<br/>";
echo number_format($num,2);//1,868.95
echo "<br/>";
$num2 = 11886655.760055;
echo number_format($num2,2,'*',',');//11,886,655*76
//*小数点位置, ','为分割位;
echo "<br/>";

echo number_format($num2,2,'.',',');//11,886,655.76
echo "<br/>";

echo number_format($num2,2,'.','.');//11.886.655.76

echo "<br/>---------trim----p96练习题1------------<br/>";
$str="&&  明日编程词典  &&";
echo $str."<br/>";
echo trim($str,"&&  &&")."kk";
echo "<br/>-------------------------<br/>";
$str = "\r\r(:@_@ 创图书编辑伟业 展软件开发雄风 @_@:)         ";
echo trim($str)."find space";
echo "<br/>";
echo trim($str,"\r\r(::)")."find space";//空格没去,左右两边的:)都去了;
echo "<br/>-----------p96练习题2--------------<br/>";
$_POST['IDcard'] = "321323198902123336";
if((strlen($_POST['IDcard'])<>15)&&(strlen($_POST['IDcard'])<>18)){                      //检测用户身份证号的长度是否正确
echo "<script>alert('用户身份证号标准长度为15位或18位才合法!');</script>";
}else{
echo "用户信息输入合法！";
}
echo "<br/>----------p96练习题3---------------<br/>";
$text="白领女子公寓，温馨街南行200米，交通便利，亲情化专人管理，您的理想选择！";
$content="女子";
echo str_ireplace($content,"<font color='red'><strong>".$content."</strong></font>",$text);
echo "<br/>-----------p96练习题4---explode--------------<br/>";
$content = "北京,上海,天津,重庆,河北,山西,辽宁,吉林,黑龙江,江苏,浙江,安徽,福建,江西,山东,河南,湖北,湖南,其他";
$data=explode(",",$content);
for($index=0;$index<count($data);$index++){
echo $data[$index];
echo "</br>";
}

?>