Detailed explanation of usage of braces '{}' in PHP with pictures and text

This article mainly introduces the usage of braces '{}' in PHP, and summarizes and analyzes the usage skills of braces in compound statements and variable definitions in PHP in the form of examples. Friends in need can refer to it

The example in this article describes the usage of braces '{}' in PHP. Share it with everyone for your reference, the details are as follows:

In PHP, curly brackets "{}" can play the following roles:

1. Merge multiple independent statements into a compound statement , for example,

is often used in if...else...2. Delimit the variable indirect reference to avoid ambiguity. For example, the difference between ${$my_var[8]} and ${$my_var}[8]

3. Used to indicate a single character in a string variable (the subscript starts from 0), such as

$my_str="1234";
$my_str{1}='5'; //现在 $my_str 内容为 '1534'

This usage is a feature after PHP 5 and is used to eliminate ambiguities caused by the use of square brackets.

4. Define the name of the variable

$var='sky';
echo "{$var}boy";

##

<?php
$count = 3 ;
echo "Count: $count";
echo "Count: {$count}";
//上面这两句结果是一样的
?>

PHP analysis double Whether the data in quotation marks contains a variable (and parses its value), when double quotation marks are used, {} is used to define the boundaries of the variable.

For example:

$***="man"
echo "Iama{$***}youknow"

PHP parses $***,

If you don’t use php, it will parse $** *youknow

But he does not exist

Output array:

echo "The array element is {$array[element]}.";
echo "The array element is {$array->element}"

The above is the content of this article All content, I hope it will be helpful to everyone's study.

Related recommendations:

Summary of the role of braces in PHP

PS web design tutorial IX - clever use of braces to design stunning consultation pages

PHP Add large numbers PHP homework php Braces php on large files

The above is the detailed content of Detailed explanation of usage of braces '{}' in PHP with pictures and text. For more information, please follow other related articles on the PHP Chinese website!