calligraphy quotes

In fact, in the previous bkJia video tutorial, I mentioned the difference and efficiency between single quotes and double quotes, but it is still not clear to many friends, I always thought that single quotes and double quotes in PHP were interconnected. I did not study them until one day I found that single

When you write a shell script on a Linux operating system, we use the $ symbol in front of the variable to get the value of the variable, usually in the script using the "$param" in a double quote format, but there are also the use of the ' $param ' with the quoted use of the scene, first of all, you see an example: Copy Code code as follows: [Root@linux ~]# Name=tektea [Root@linux ~]# Echo $name Tektea [Root@linux ~]# sayhello= "Hello $name" [Root@linux ~]# Echo $sayhello Hello Te

Just testing found a simple, seemingly correct code that was wrong:[PHP]View Plaincopy $json _str = "{' name ': ' Eric ', ' age ': 23}"; Var_dump (Json_decode ($json _str)); As you know, the PHP version has added two JSON-capable functions since 5.2.0, namely Json_encode and Json_decode, where the Json_decode function converts the JSON string to a JSON object, as shown in the previous example. But the output of the above example is null, that is, the conversion failed. T

Punctuation Marks in programming languages are not something we can add to others and know what you want to say, but computers are different. improper use may cause errors and cause a lot of trouble to you, the use of single quotes and double quotes in PHP is a common problem for new users. The difference between the two is described in this article. I hope it will help new users! In PHP, a string is usuall

Avoid single quotation marks. double quotation marks are escaped on the acceptance page. On the PHP page, if you do not want to see the following situations: single quotes are escaped as double quotes and escaped as double quotes, you can set the following settings to prevent them: Method 1: in php. set in ini: magic_quotes_gpc PHP page if you do not want the fol

Ec (2); double quotation marks will enable the program to check whether a variable is used for variables. Only double quotation marks can be compiled to replace them with variable values. nbsp; there are also double quotation marks for n and so on. The single quotation marks are used to directly output n, and the single quotation marks will directly display the features of the single quotation marks, saving time, the compiler will not translate it as a variable. We recommend that you use single

PHP JSON string to special character processing (single quotation marks, double quotes) Preface: Form form Post,get and so on to submit data to the background, the background with PHP to receive the submitted data contains "" "," "", "\" (double quotes, single quotes, backslashes), the new version of PHP (MAGIC_QUOTES_GPC when the php.ini is set to ON, Automatic

Many ASP users may lose their way in double quotation marks, single quotation marks, and ampersand. The most important thing is not understanding the meaning of the three types of symbols. Of course, they cannot be well understood. The following are my views on the three types of symbols. If the technology is not refined, it is inevitable that there will be negligence. I would like to ask for more comments. 1, double quotation marks "" ASP in double quotes