Home > Backend Development > PHP Tutorial > What is the difference between the three functions var_dump, var_export and print_r in php?

What is the difference between the three functions var_dump, var_export and print_r in php?

怪我咯
Release: 2023-03-12 20:18:01
Original
1407 people have browsed it

This article is a detailed analysis and introduction to the differences between the three functions of var_dump, var_export and print_r in PHP. Friends in need can refer to it

The following example looks at the specific differences between these three functions. Var_dump and var_export are less commonly used, but they are very similar. So you can take a look:

The code is as follows:

<?php
$a = array(1,1,32,322,3433,array(32,232,23232));
$b = 1234;
$c = "alsdfl;asdf";
$d = &#39;a&#39;;
$e = fopen("slsl.txt", "r");
var_dump($a);
echo "<br>";
var_dump($b);
echo "<br>";
var_dump($c);
echo "<br>";
var_dump($d);
echo "<br>";
var_dump($e);
echo "<br>";
echo "<br>";
echo "<br>";
echo "<br>";
var_export($a);
echo "<br>";
var_export($b);
echo "<br>";
var_export($c);
echo "<br>";
var_export($d);
echo "<br>";
var_export($e);
echo "<br>";
echo "<br>";
echo "<br>";
echo "<br>";
print_r($a);
echo "<br>";
print_r($b);
echo "<br>";
print_r($c);
echo "<br>";
print_r($d);
echo "<br>";
print_r($e);
echo "<br>";
Copy after login

Output:

The code is as follows:

Warning: fopen(slsl.txt) [function.fopen]: failed to open stream: No such file or directory in E:\mywww\yangtest\base1.php on line 6
array(6) { [0]=> int(1) [1]=> int(1) [2]=> int(32) [3]=> int(322) [4]=> int(3433) [5]=> array(3) { [0]=> int(32) [1]=> int(232) [2]=> int(23232) } }
int(1234)
string(11) "alsdfl;asdf"
string(1) "a"
bool(false)
array ( 0 => 1, 1 => 1, 2 => 32, 3 => 322, 4 => 3433, 5 => array ( 0 => 32, 1 => 232, 2 => 23232, ), )
1234
&#39;alsdfl;asdf&#39;
&#39;a&#39;
false
Array ( [0] => 1 [1] => 1 [2] => 32 [3] => 322 [4] => 3433 [5] => Array ( [0] => 32 [1] => 232 [2] => 23232 ) )
1234
alsdfl;asdf
a
Copy after login

Now you can see the effect. Note that the last one is not that I didn’t paste it over, but that it didn’t display anything in the first place.

The above is the detailed content of What is the difference between the three functions var_dump, var_export and print_r in php?. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template