PHP page jump - common method, php page jump
PHP page jump 1. header() function
The header() function is a very simple method for page jump in PHP. The main function of the header() function is to output the HTTP protocol header (header) to the browser.
The header() function is defined as follows:
<p>void header (string string [,bool replace [,int http_response_code]])</p>
The optional parameter replace specifies whether to replace the previous similar header or add a header of the same type. The default is replacement.
The second optional parameter http_response_code forces the HTTP response code to the specified value. The Location type header in the header function is a special header call, often used to implement page jumps. Note: 1. There cannot be a space between location and ":", otherwise it will not jump.
2. There cannot be any output before using the header.
3. The PHP code after the header will also be executed. For example, redirect the browser to Guanwei Blog
<p>< ?php<br />//重定向浏览器<br />header("Location: http://www.guanwei.org");<br />//确保重定向后,后续代码不会被执行<br />exit;<br />?></p>
PHP page jump 2, Meta tag
TheMeta tag is a tag in HTML that is responsible for providing document meta-information. Using this tag in a PHP program can also achieve page jumps. If http-equiv is defined as refresh, when the page is opened, it will jump to the corresponding page within a certain period of time based on the value specified by content.
If content="seconds;url=website" is set, it defines how long it takes for the page to jump to the specified URL. For example, use the meta tag to automatically jump to the Guanwei blog after the vaccine.
<p>< meta http-equiv="refresh" content="1;url=http://www.guanwei.org"></p>
For example, the following program meta.php implements the page to automatically jump to www.guanwei.org after staying on the page for one second.
<p>< ?php<br />$url = "http://www.guanwei.org"; ?><br />< html><br />< head><br />< meta http-equiv="refresh" content="1; url=< ?php echo $url; ?>"><br />< /head><br />< body><br />页面只停留一秒……<br />< /body><br />< /html></p>
PHP page jump 3, JavaScript (commonly used, recommended)
For example, this code can be placed anywhere in the program that is legal.
<p>< ?php<br />$url = "http://www.guanwei.org";<br />echo "<script language='javascript' type='text/javascript'>";<br />echo "window.location.href='$url'";<br />echo "</script>";<br />?></p>
It is not convenient to use php to jump. Most use js to achieve the jump
For example:
echo "<script>location.href='t.php';< /script>"; // Jump to t.php<br /> <br />This method is more commonly used<br/>
<div class="header2"><span class="icon i-relatedanswer"><h3>Linux Comprehensive Guide: Several methods of page jump in PHP <div class="best-replyer">
<p class="ft p1">In actual development, various functions of the website can be satisfied by writing in PHP language, such as PHP page jump. Discuss the order of PHP variable parsing, how to obtain submitted data, in-depth interpretation of PHP operating mechanism, brief analysis of PHP function extract() application skills, and summarize some PHP information functions for you. PHP query string skills share. In the Web system, jump from one web page to another. It is one of the most commonly used technologies in LAMP projects. Page jumps may be caused by users clicking links, buttons, etc., or they may be automatically generated by the system. Here we introduce the methods commonly used in PHP to realize automatic page jump. PHP page jump 1. header() function The header() function is a very simple method for page jump in PHP. The main function of the header() function is to output the HTTP protocol header (header) to the browser. The header() function is defined as follows: void header (string string [,bool replace [,int http_response_code]]) The optional parameter replace indicates whether to replace the previous similar header or add a header of the same type. The default is replacement. The second optional parameter http_response_code forces the HTTP response code to the specified value. The Location type header in the header function is a special header call, often used to implement page jumps. <br/>
</script>

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。

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。

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。


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