php中simplexml_load_file函数用法实例,simplexml
本文实例讲述了php中simplexml_load_file函数用法。分享给大家供大家参考。具体用法分析如下:
在php中simplexml_load_file() 函数把 XML 文档载入对象中之后我们就可以利用由此函数返回的对象进行相关的操作了,下面我们看几个测试实例.
例子,XML文件代码如下:
复制代码 代码如下:
Don't forget the meeting!
PHP 代码如下:
复制代码 代码如下:
if (file_exists('test.xml'))
{
$xml = simplexml_load_file('test.xml');
var_dump($xml);
}
else
{
exit('Error.');
}
?>
运行输出结果如下:
复制代码 代码如下:
object(SimpleXMLElement)#1 (4) {
["to"]=>
string(6) "George"
["from"]=>
string(4) "John"
["heading"]=>
string(8) "Reminder"
["body"]=>
string(25) "Don't forget the meeting!"
}
假如有一个“iciba.xml”文件,其内容如下:
复制代码 代码如下:
在PHP语言中我们可以用以下方法取得我们想要的值:
复制代码 代码如下:
$xmldata = simplexml_load_file("iciba.xml");
header("Content-Type: text/html; charset=UTF-8");
print_r($xmldata); //第一部分
$listcount = count($xmldata->sent);
for($i=0;$i
$dictlist = $xmldata->sent[$i];
echo "
例句:".$dictlist->orig;
echo "
翻译:".$dictlist->trans;
}
?>
“第一部分”将输出:
复制代码 代码如下:
SimpleXMLElement Object
(
[@attributes] => Array
(
[num] => 219
[id] => 219
[name] => 219
)
[key] => 天空
[pos] => SimpleXMLElement Object
(
)
[acceptation] => Array;Array;
[sent] => Array
(
[0] => SimpleXMLElement Object
(
[orig] => The church tower stood against the sky like a finger pointing towards heaven.
[trans] => 教堂的尖塔在天空的映衬下宛如指向天空的手指。
)
[1] => SimpleXMLElement Object
(
[orig] => A balloon floated across the sky.
[trans] => 气球飘过天空。
)
[2] => SimpleXMLElement Object
(
[orig] => A bolt of lightning lit up the sky.
[trans] => (一道)闪电照亮了天空。
)
[3] => SimpleXMLElement Object
(
[orig] => A bright moving object appeared in the sky at sunset.
[trans] => 日落西山时,天空出现了一个移动的发亮物体。
)
[4] => SimpleXMLElement Object
(
[orig] => A bright rainbow arched above.
[trans] => 一弯明亮的彩虹悬挂在天空。
)
)
)
“第二部分”将输出:
复制代码 代码如下:
例句:The church tower stood against the sky like a finger pointing towards heaven.
翻译:教堂的尖塔在天空的映衬下宛如指向天空的手指。
例句:A balloon floated across the sky.
翻译:气球飘过天空。
例句:A bolt of lightning lit up the sky.
翻译:(一道)闪电照亮了天空。
例句:A bright moving object appeared in the sky at sunset.
翻译:日落西山时,天空出现了一个移动的发亮物体。
例句:A bright rainbow arched above.
翻译:一弯明亮的彩虹悬挂在天空。
例子,更深入的一个遍历输出生成表格,代码如下:
复制代码 代码如下:
eader("content-type:text/html; charset=utf-8"); //设置编码
$xml = simplexml_load_file('a.xml'); //载入xml文件 $lists和xml文件的根节点是一样的
echo $xml->company."
";
echo $xml->town."
id:";
echo $xml->town['id']."
parent:";
echo $xml->town['parent']."
";
echo "
循环读取:
";
foreach($xml->user as $users){ //有多个user,取得的是数组,循环输出
echo "-------------------
";
echo "姓名:".$users->name."
";
echo "编号:".$users->age."
";
echo "性别:".$users->age['sex']."
";
echo "序号:".$users->height."
";
}
echo "
循环读取:
";
foreach($xml->town as $towns){ //有多个user,取得的是数组,循环输出
echo "-------------------
";
echo "id:".$towns['id']."
";
echo "归属:".$towns['parent']."
";
echo "地区:".$towns."
";
}
希望本文所述对大家的PHP程序设计有所帮助。

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。


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