php echo 输出字符串函数详解_PHP
echo
php
复制代码 代码如下:
echo "asd";//字符串
echo "ads$c";//字符串+变量
echo 'ads$c';//字符串 asd$c $c不是变量
echo "sd"."vs";
echo "sd","vs";
echo $a;
echo $a.$b;
echo $a,$b;
echo $a.$b.$c;
echo $a,$b,$c;
echo "kaskd{$c}asd";
echo "kakskd{$arr['lo']}";
echo "kakskd{$obj->a}";
echo "kaskd".$c."kasd";
echo "kaskd".$arr['lo']."kasd";
echo "kaskd".$obj->a."kasd";
echo "kaskd".func($c)."kasd";
echo "kaksk".($a+1)."dkkasd";
echo $c."jaksd";
echo $c,"jaksd";
//php多行输出方法
echo This uses the "here document" syntax to output
END;
//输出简写
=$a?>
复制代码 代码如下:
echo "Hello World";
echo "This spans
multiple lines. The newlines will be
output as well";
echo "This spans\nmultiple lines. The newlines will be\noutput as well.";
echo "Escaping characters is done \"Like this\".";
// You can use variables inside of an echo statement
$foo = "foobar";
$bar = "barbaz";
echo "foo is $foo"; // foo is foobar
// You can also use arrays
$baz = array("value" => "foo");
echo "this is {$baz['value']} !"; // this is foo !
// Using single quotes will print the variable name, not the value
echo 'foo is $foo'; // foo is $foo
// If you are not using any other characters, you can just echo variables
echo $foo; // foobar
echo $foo,$bar; // foobarbarbaz
// Some people prefer passing multiple parameters to echo over concatenation.
echo 'This ', 'string ', 'was ', 'made ', 'with multiple parameters.', chr(10);
echo 'This ' . 'string ' . 'was ' . 'made ' . 'with concatenation.' . "\n";
echo This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon. no extra whitespace!
END;
// Because echo does not behave like a function, the following code is invalid.
($some_var) ? echo 'true' : echo 'false';
// However, the following examples will work:
($some_var) ? print 'true' : print 'false'; // print is also a construct, but
// it behaves like a function, so
// it may be used in this context.
echo $some_var ? 'true': 'false'; // changing the statement around
?>
以下是官方手册说明:
Definition and Usage
定义和用法
The echo() function outputs one or more strings.
echo()函数的作用是:输出一个或多个字符串。
Syntax
语法
echo(strings)
Parameter参数 Description描述
strings Required. One or more strings to be sent to the output
必要参数。指定一个或多个需要被发送到结果中的字符串
Tips and Notes
提示和注意点
Note: The echo() function is not actually a function, so you are not required to use parentheses with it. However, if you want to pass more than one parameter to echo(), using parentheses will generate a parse error.
注意:echo()函数不是一个真正意义上的函数,所以你没有必要一定去使用它。如果你想把多于一个的参数传递给echo()函数,那么使用圆括号“()”将产生错误。
Tip: The echo() function is slightly faster than print().
提示:echo()函数相当于print()函数的简化版本。
Tip: The echo() function has the following shortcut syntax. See example 5.
提示:echo()函数包含下面的简便写法。具体见:案例5。
Example 1
案例1
复制代码 代码如下:
$str = "Who's Kai Jim?";
echo $str;
echo "
";
echo $str."
I don't know!";
?>
The output of the code above will be:
上述代码将输出下面的结果:
Who's Kai Jim?Who's Kai Jim?I don't know!
Example 2
案例2
复制代码 代码如下:
echo "This textspans multiplelines.";
?>
The output of the code above will be:
上述代码将输出下面的结果:
This text spans multiple lines.
Example 3
案例3
复制代码 代码如下:
echo 'This ','string ','was ','made ','with multiple parameters';
?>
The output of the code above will be:
上述代码将输出下面的结果:
This string was made with multiple parameters
Example 4
案例4
Difference of single and double quotes. Single quotes will print the variable name, not the value:
区别单引号(')和双引号(”)的不同。单引号将输出变量名,而不是变量的值:
复制代码 代码如下:
$color = "red";
echo "Roses are $color";
echo "
";
echo 'Roses are $color';
?>
The output of the code above will be:
上述代码将输出下面的结果:
Roses are redRoses are $color
Example 5
案例5
Shortcut syntax:
简写(捷径)语法:
复制代码 代码如下:
$color = "red";
?>
echo "asd";//字符串
echo "ads$c";//字符串+变量
echo 'ads$c';//字符串 asd$c $c不是变量
echo "sd"."vs";
echo "sd","vs";
echo $a;
echo $a.$b;
echo $a,$b;
echo $a.$b.$c;
echo $a,$b,$c;
echo "kaskd{$c}asd";
echo "kakskd{$arr['lo']}";
echo "kakskd{$obj->a}";
echo "kaskd".$c."kasd";
echo "kaskd".$arr['lo']."kasd";
echo "kaskd".$obj->a."kasd";
echo "kaskd".func($c)."kasd";
echo "kaksk".($a+1)."dkkasd";
echo $c."jaksd";
echo $c,"jaksd";
//php多行输出方法
echo This uses the "here document" syntax to output
END;
//输出简写
=$a?>
复制代码 代码如下:
echo "Hello World";
echo "This spans
multiple lines. The newlines will be
output as well";
echo "This spans\nmultiple lines. The newlines will be\noutput as well.";
echo "Escaping characters is done \"Like this\".";
// You can use variables inside of an echo statement
$foo = "foobar";
$bar = "barbaz";
echo "foo is $foo"; // foo is foobar
// You can also use arrays
$baz = array("value" => "foo");
echo "this is {$baz['value']} !"; // this is foo !
// Using single quotes will print the variable name, not the value
echo 'foo is $foo'; // foo is $foo
// If you are not using any other characters, you can just echo variables
echo $foo; // foobar
echo $foo,$bar; // foobarbarbaz
// Some people prefer passing multiple parameters to echo over concatenation.
echo 'This ', 'string ', 'was ', 'made ', 'with multiple parameters.', chr(10);
echo 'This ' . 'string ' . 'was ' . 'made ' . 'with concatenation.' . "\n";
echo This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon. no extra whitespace!
END;
// Because echo does not behave like a function, the following code is invalid.
($some_var) ? echo 'true' : echo 'false';
// However, the following examples will work:
($some_var) ? print 'true' : print 'false'; // print is also a construct, but
// it behaves like a function, so
// it may be used in this context.
echo $some_var ? 'true': 'false'; // changing the statement around
?>
以下是官方手册说明:
Definition and Usage
定义和用法
The echo() function outputs one or more strings.
echo()函数的作用是:输出一个或多个字符串。
Syntax
语法
echo(strings)
Parameter参数 Description描述
strings Required. One or more strings to be sent to the output
必要参数。指定一个或多个需要被发送到结果中的字符串
Tips and Notes
提示和注意点
Note: The echo() function is not actually a function, so you are not required to use parentheses with it. However, if you want to pass more than one parameter to echo(), using parentheses will generate a parse error.
注意:echo()函数不是一个真正意义上的函数,所以你没有必要一定去使用它。如果你想把多于一个的参数传递给echo()函数,那么使用圆括号“()”将产生错误。
Tip: The echo() function is slightly faster than print().
提示:echo()函数相当于print()函数的简化版本。
Tip: The echo() function has the following shortcut syntax. See example 5.
提示:echo()函数包含下面的简便写法。具体见:案例5。
Example 1
案例1
复制代码 代码如下:
$str = "Who's Kai Jim?";
echo $str;
echo "
";
echo $str."
I don't know!";
?>
The output of the code above will be:
上述代码将输出下面的结果:
Who's Kai Jim?Who's Kai Jim?I don't know!
Example 2
案例2
复制代码 代码如下:
echo "This textspans multiplelines.";
?>
The output of the code above will be:
上述代码将输出下面的结果:
This text spans multiple lines.
Example 3
案例3
复制代码 代码如下:
echo 'This ','string ','was ','made ','with multiple parameters';
?>
The output of the code above will be:
上述代码将输出下面的结果:
This string was made with multiple parameters
Example 4
案例4
Difference of single and double quotes. Single quotes will print the variable name, not the value:
区别单引号(')和双引号(”)的不同。单引号将输出变量名,而不是变量的值:
复制代码 代码如下:
$color = "red";
echo "Roses are $color";
echo "
";
echo 'Roses are $color';
?>
The output of the code above will be:
上述代码将输出下面的结果:
Roses are redRoses are $color
Example 5
案例5
Shortcut syntax:
简写(捷径)语法:
复制代码 代码如下:
$color = "red";
?>
Roses are =$color?>
本站声明
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系admin@php.cn

热AI工具

Undresser.AI Undress
人工智能驱动的应用程序,用于创建逼真的裸体照片

AI Clothes Remover
用于从照片中去除衣服的在线人工智能工具。

Undress AI Tool
免费脱衣服图片

Clothoff.io
AI脱衣机

AI Hentai Generator
免费生成ai无尽的。

热门文章
R.E.P.O.能量晶体解释及其做什么(黄色晶体)
2 周前
By 尊渡假赌尊渡假赌尊渡假赌
仓库:如何复兴队友
1 个月前
By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island冒险:如何获得巨型种子
4 周前
By 尊渡假赌尊渡假赌尊渡假赌
击败分裂小说需要多长时间?
3 周前
By DDD
R.E.P.O.保存文件位置:在哪里以及如何保护它?
3 周前
By DDD

热工具

记事本++7.3.1
好用且免费的代码编辑器

SublimeText3汉化版
中文版,非常好用

禅工作室 13.0.1
功能强大的PHP集成开发环境

Dreamweaver CS6
视觉化网页开发工具

SublimeText3 Mac版
神级代码编辑软件(SublimeText3)

PHP 8.4 带来了多项新功能、安全性改进和性能改进,同时弃用和删除了大量功能。 本指南介绍了如何在 Ubuntu、Debian 或其衍生版本上安装 PHP 8.4 或升级到 PHP 8.4

CakePHP 是 PHP 的开源框架。它的目的是使应用程序的开发、部署和维护变得更加容易。 CakePHP 基于类似 MVC 的架构,功能强大且易于掌握。模型、视图和控制器 gu

Visual Studio Code,也称为 VS Code,是一个免费的源代码编辑器 - 或集成开发环境 (IDE) - 可用于所有主要操作系统。 VS Code 拥有针对多种编程语言的大量扩展,可以轻松编写
