10 recommended examples of use of the EXEC () function

In PHP, the curl_exec function is one of the PHP Curl function lists, and its function is to perform a curl session. In this article, we summarize some examples of the usage of PHP curl_exec functions. I. Examples of usage of PHP curl_exec functions This article explains the syntax and examples of PHP curl_exec functions, which should be called after initializing a curl session and all options are set. His return value: Returns TRUE on success, or FALSE on failure. However, if the Curlopt_returntransfer option is set, the execution result is returned when the function executes successfully, and FALSE on failure. Two. PHP curl_exec () function curl Gets the return value method this article mainly introduces two kinds of PHP curl_exec () function curl to get the return value of the method, "the first to get the page content, direct output example." The second kind gets the page content, does not output the example directly

1. PHP curl_exec () return value summary

Summary: In PHP, the curl_exec function is one of the PHP Curl function lists, and its function is to perform a curl session. In this article, we summarize some examples of the usage of PHP curl_exec functions.

2. PHP curl_exec () function curl Gets the return value of the method

Summary: There is a parameter Curlopt_returntransfer in curl: This parameter returns the information obtained by CURL_EXEC () in the form of a file stream, rather than a direct output. For example: The function of the Curlopt_returntransfer parameter is to assign the contents of the Crul to a variable. It defaults to 0 of the text stream that returns the output directly, and sometimes it's not good to take the return value for judgment or other purposes. So, sometimes we want the returned content to be stored as a variable, not a direct output, so what should we do?

3. Three ways to execute SQL statements in PDO

Summary: In PDO, we can execute SQL statements in three ways, namely the Exec () method, the Query method, and the preprocessing statement prepare () and Execute () methods ~

4. Simple Introduction to PHP exec () function no return value troubleshooting method (recommended)

Introduction: The following small series for everyone to bring a brief talk about the PHP exec () function no return value troubleshooting method (Must SEE). Small series feel very good, now share to everyone, also for everyone to make a reference. Let's take a look at it with a little knitting.

5. Details how PHP uses the PDO exec () function to query the number of rows affected after execution

Introduction: This article mainly introduces PHP using the PDO under the EXEC () function query after the execution of the affected rows of the method, combined with examples of PHP in the use of PDO for the operation of the modified EXEC () function query operation after the execution of the affected line number of the relevant implementation tips and considerations, A friend you need can refer to the following

6. Execute SQL statements in PDO

Summary: the exec () method exec () method returns the number of rows affected after execution, with the following syntax: The int pdo::exec (string statement) parameter statement is the SQL statement to execute. The method returns the number of rows that were affected when the query was executed, typically in Insert,delete and update statements. For example: $dbms = ' mysql ';//database type $dbname= ' admin ';//Database used $US

7. PHP Security-Command injection

Summary: Command injection using system commands is a risky operation, especially if you are trying to use remote data to construct a command to execute. If the contaminated data is used, the command injection vulnerability is generated. Exec () ...

8. Python built-in function--compile

Introduction: This function is used to compile a string of source code, the result can be generated bytecode or AST (like syntax tree), bytecode can be executed using function exec (), and AST can use Eval () to continue compiling. 2. The parameter source is a string of source code, or an AST object array.

9. Anatomy using a php shell script

Introduction: PHP After a long period of development, a lot of users are very familiar with PHP, here I publish a personal understanding, and we discuss the discussion. In most cases, I use the exec () command and the data array to handle everything. or use Shell_exec () for simpler commands, especially if you don't care about the results.

Ten. PHP Execution operators

Summary: PHP supports an execution operator: an inverse quotation mark ('). Note that this is not a single quote! PHP will attempt to execute the contents of the backslash as a shell command and return its output information (that is, it can be assigned to a variable rather than simply discarded to standard output). The effect of using the inverse quote operator "'" is the same as the function shell_exec ().

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