PHP echo()Functions

PHP String 参考手册PHP String Reference Manual

Examples

Output some text:

<?php
echo "Hello world!";
?>

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Definition and Usage

The echo() function outputs one or more strings.

Note:The echo() function is not actually a function, so you do not need to use parentheses with it. However, if you want to pass more than one parameter to echo(), using parentheses will generate a parse error.

Tip:The echo() function, compared toprint()is slightly faster in speed.

Tip:The echo() function also has a shorthand syntax. Before PHP 5.4.0, this syntax was only available when the short_open_tag configuration setting was enabled.

Syntax

echo(strings)

Parameter Description
strings Required. One or more strings to be sent to the output.

Technical Details

Return value: No return value.
PHP version: 4+

More Examples

Example 1

Output the value of the string variable ($str):

<?php
$str = "Hello world!";
echo $str;
?>

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Example 2

Output the value of the string variable ($str), including HTML tags:

<?php
$str = "Hello world!";
echo $str;
echo "<br>What a nice day!";
?>

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Example 3

Concatenate two string variables:

<?php
$str1="Hello world!";
$str2="What a nice day!";
echo $str1 . " " . $str2;
?>

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Example 4

Output the value of an array:

<?php
$age=array("Peter"=>"35");
echo "Peter is " . $age['Peter'] . " years old.";
?>

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Example 5

Output some text:

<?php
echo "This text
spans multiple
lines.";
?>

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Example 6

How to use multiple parameters:

<?php
echo 'This ','string ','was ','made ','with multiple parameters.';
?>

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Example 7

The difference between single and double quotes. Single quotes will output the variable name, not the value:

<?php
$color = "red";
echo "Roses are $color";
echo "<br>";
echo 'Roses are $color';
?>

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Example 8

Shorthand syntax (only applies when the short_open_tag configuration setting is enabled):

<?php
$color = "red";
?>

<p>Roses are <?=$color?></p>

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