What command is not the output command of php

The write command is not the output command of PHP. There are two basic output methods in PHP. The output commands are echo and print. Echo can output one or more strings, while print only allows one output. String, and the return value is always 1.

#The operating environment of this article: Windows7 system, PHP7.1, Dell G3 computer.

What command is not the output command of php?

The write command is not the output command of php.

There are two basic output methods in PHP: echo and print.

Note: The printf() function outputs a formatted string.

PHP echo and print statements

The difference between echo and print:

echo - can output one or more strings

print - Only one string is allowed to be output, and the return value is always 1

Tips: echo outputs faster than print, echo has no return value, and print has a return value of 1.

PHP echo statement

echo is a language structure, which can be used without parentheses or with parentheses: echo or echo().

Display string

The following example demonstrates how to use the echo command to output a string (the string can contain HTML tags):

Example

<?php
echo "<h2>PHP 很有趣!</h2>";
echo "Hello world!<br>";
echo "我要学 PHP!<br>";
echo "这是一个", "字符串，", "使用了", "多个", "参数。";
?>

Display variables

The following example demonstrates how to use the echo command to output variables and strings:

Example

<?php
$txt1="学习 PHP";
$txt2="RUNOOB.COM";
$cars=array("Volvo","BMW","Toyota");
 
echo $txt1;
echo "<br>";
echo "在 $txt2 学习 PHP ";
echo "<br>";
echo "我车的品牌是 {$cars[0]}";
?>

PHP print statement

print is also a language structure that can use parentheses or not: print or print().

Display string

The following example demonstrates how to use the print command to output a string (the string can contain HTML tags):

Example

<?php
print "<h2>PHP 很有趣!</h2>";
print "Hello world!<br>";
print "我要学习 PHP!";
?>

Display variables

The following example demonstrates how to use the print command to output variables and strings:

Example

<?php
$txt1="学习 PHP";
$txt2="RUNOOB.COM";
$cars=array("Volvo","BMW","Toyota");
 
print $txt1;
print "<br>";
print "在 $txt2 学习 PHP ";
print "<br>";
print "我车的品牌是 {$cars[0]}";
?>

Recommended Study: "PHP Video Tutorial"

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