Home Backend Development PHP Tutorial PHP determines character type. Analysis of common string output methods in PHP. Original

PHP determines character type. Analysis of common string output methods in PHP. Original

Jul 28, 2016 am 08:27 AM

本文讲述了php常用字符串输出方法。分享给大家共大家参考,具体如下:

1. echo用法:可用echo 直接输出,也可以用echo()输出,无返回值

$string="<b>加粗显示文字</b>";
echo $string;
//echo "<br/>";
//echo($string);//效果同上
echo "<br/>";
echo "This ", "is ", " echo test!";//echo输出用逗号隔开的多个字符串
echo "<br/>";
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2. print用法:同上echo一样,只是print运行速度比echo慢,且一次只能输出一个字符串,始终返回1

$string="<b>加粗显示文字</b>";
print $string;
//print "<br/>";
//print($string);//效果同上
print "<br/>";
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3. printf:格式化输出字符串

/*
%% - 返回一个百分号 %
%b - 二进制数
%c - ASCII 值对应的字符
%d - 包含正负号的十进制数(负数、0、正数)
%e - 使用小写的科学计数法(例如 1.2e+2)
%E - 使用大写的科学计数法(例如 1.2E+2)
%u - 不包含正负号的十进制数(大于等于 0)
%f - 浮点数(本地设置)
%F - 浮点数(非本地设置)
%g - 较短的 %e 和 %f
%G - 较短的 %E 和 %f
%o - 八进制数
%s - 字符串
%x - 十六进制数(小写字母)
%X - 十六进制数(大写字母)
*/
$num=23;
printf("printf输出浮点数:%f",$num);//输出:23.000000
printf("<br/>");
printf("printf输出2位小数浮点数:%1\$.2f <br/>printf输出无小数位:%1\$u",$num);//输出:23.00
printf("<br/>");

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4. sprintf:

$name="Tom";
$age=20;
$printstr=sprintf("sprintf输出:他名字叫%s,年龄是%u",$name,$age);
echo $printstr;//输出:他名字叫Tom,年龄是20
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希望本文所述对大家php程序设计有所帮助。

以上就介绍了PHP判断字符类型 php常用字符串输出方法分析 原创,包括了PHP判断字符类型方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

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