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php中的phpinfo()函数有什么用

Jun 02, 2016 am 11:31 AM
phpphpinfo()

php中的phpinfo()函数的作用:phpinfo()函数是php中的一个内置函数,它可以提供关于系统中安装的php版本和php配置的详细信息。该函数在执行成功时返回true,执行失败时返回false。

php中的phpinfo()函数有什么用

phpinfo()函数

phpinfo()函数会输出关于 PHP 配置的信息。

phpinfo()是PHP中的一个内置函数,可以提供关于系统中安装的PHP版本和PHP配置的详细信息。phpinfo()函数返回一个布尔值;也就是说,它在成功时返回true,在faliure时返回false 。

基本语法:

phpinfo ([ int $what = INFO_ALL ] )

参数:

$what是一个可省略的参数,但$what被省略,则会输出全部的配置信息。

它可以有以下值:

● INFO_GENERAL:信息概述,用于显示配置行、php.ini位置、构建日期、Web服务器、系统等。

● INFO_CREDITS:用于显示PHP Credits。

● INFO_CONFIGURATION: 信息配置,用于显示PHP指令的当前值,本地值和主值。

● INFO_MODULES:信息模块,用于显示已加载的模块及其各自的设置。

● INFO_ENVIRONMENT:信息环境,用于显示环境变量信息。

● INFO_VARIABLES:信息变量,它显示来自EGPCS(环境,GET,POST,Cookie,服务器)的所有预定义变量。

● INFO_LICENSE:信息许可,用于显示PHP许可证信息。

● INFO_ALL:全部信息,显示以上所有信息。

返回类型:phpinfo()函数返回一个布尔值。也就是说,它在成功时返回true,在faliure时返回false 。

示例:

<?php 
phpinfo(); 
?>

输出:

1.png

会显示有关PHP版本,配置,环境详细信息等的完整信息。

注意:使用CLI模式时,phpinfo()输出纯文本而不是HTML。

更多相关知识,请访问 PHP中文网!!

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