What is the usage of php echo

In PHP, echo is used to output one or more strings. Its usage syntax is "echo(strings)". The parameter strings represents one or more strings to be sent to the output.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

php What is the usage of echo?

echo() function outputs one or more strings.

Note: The echo() function is not actually a function, so you don't have to use parentheses with it. However, if you wish to pass more than one argument to echo(), using parentheses will generate a parsing error.

Tip: The echo() function is slightly faster than print().

Tip: The echo() function also has abbreviated syntax. Prior to PHP 5.4.0, this syntax only worked if the short_open_tag configuration setting was enabled.

Syntax

echo(strings)

Parameters

strings Required. One or more strings to send to the output.

Example:

Example 1

Write the value of the string variable ($str) to the output:

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

Example 2

Write the value of the string variable ($str) to the output, including the HTML tag:

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

Example 3

Connect two string variables:

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

Example 4

Write array value to output:

<?php
$age=array("Peter"=>"35");
echo "Peter is " . $age[&#39;Peter&#39;] . " years old.";
?>

Example 5

Write text to output:

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

Example 6

How to use multiple parameters:

<?php
echo &#39;This &#39;,&#39;string &#39;,&#39;was &#39;,&#39;made &#39;,&#39;with multiple parameters.&#39;;
?>

Example 7

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

<?php
$color = "red";
echo "Roses are $color";
echo "<br>";
echo &#39;Roses are $color&#39;;
?>

Example 8

Simplified syntax (only applicable when the short_open_tag configuration setting is enabled):

<?php
$color = "red";
?>
<p>Roses are <?=$color?></p>

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