What is the difference between echo statement and vardump function in php

The difference between the echo statement and the vardump function in php is that echo is used to output one or more strings, while var_dump is used to output relevant information about the specified variable, such as type, value, length, etc.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

The difference between the echo statement and the vardump function in php is:

echo is used to output one or more strings, while var_dump is used to output relevant information about the specified variable, such as type, Value and length, etc.

The code example is as follows:

<?php
$example_var = "Hello World!";

// 使用 echo 显示变量值。
echo $example_var;
// 输出: Hello World!

// 使用 var_dump 显示变量的类型和完整信息。
var_dump($example_var);
// 输出: string(12) "Hello World!"
?>

From the above example, we can see that the echo output is only the value of the variable, and var_dump will also display it before outputting it. The data type of the variable and its details.

Another thing to note is that echo can output multiple variables at the same time, while var_dump can only output specified variables and only one at a time.

<?php
$var1 = "Hello";
$var2 = "World!";

// echo可以同时输出多个变量。
echo $var1 . " " . $var2;
// 输出: Hello World!

// var_dump只能一次输出一个变量的信息。
var_dump($var1);
// 输出: string(5) "Hello"
?>

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