The difference between print and echo in php

In PHP, print() returns a Boolean value, while echo has no return value. Use print() to check the output or output multiple expressions at the same time, while echo is suitable for situations where you don't need to check the output or output expressions one by one.

print() and echo in PHP

In PHP, print() and echo are both language structures for output data. Despite their similarities, there are subtle differences in usage.

Main difference

The main difference is that print() returns a Boolean value, while echo has no return value.

Using

1. print()

• Returns a Boolean value indicating whether the output is successful.
• If the output is successful, it returns true; if it fails, it returns false.
• Can output multiple expressions at the same time.

Syntax:

print($expression1, $expression2, ...);

2. echo

• does not return any value.
• Does not support outputting multiple expressions at the same time and can only output them one by one.

Syntax:

echo $expression;

When to use print() and echo

Use print( ):

• When you need to check whether the output is successful.
• When multiple expressions need to be output at the same time.

Use echo:

• When there is no need to check the output results.
• When you need to output expressions one by one.

Example

// 输出一个字符串
print("Hello world!"); // 返回 true

// 同时输出两个表达式
print(5 + 10, "\n"); // 返回 true, 输出 "15" 和换行符

// 输出一个字符串，但不检查结果
echo "This is a message.\n";

Conclusion

While print() and echo is a language structure used to output data in PHP, but print() returns a Boolean value, while echo has no return value. Use print() when you need to check the output results or output multiple expressions at the same time; otherwise, use echo.

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