Last updated: 2020-05-09 18:24:20

    Currently, the following versions of PHP programming language are supported:

    • PHP 5.6
    • PHP 7.2

    Function Format

    The PHP function format is generally as follows:

    <?php
    
    function main_handler($event, $context) {
        echo("hello world");
        print_r($event);
        return "hello world";
    }
    
    ?>

    Execution Method

    When you create an SCF function, you need to specify an execution method. If the PHP programming language is used, the execution method is similar to index.main_handler, where index indicates that the executed entry file is index.php, and main_handler indicates that the executed entry function is main_handler. When submitting the zip code package by uploading the zip file locally or through COS, please make sure that the root directory of the package contains the specified entry file, the file contains the entry function specified by the definition, and the names of the file and function match those entered in the trigger; otherwise, execution will fail as the entry file or entry function cannot be found.

    Input Parameters

    The input parameters in the PHP environment include $event and $context.

    • $event: this parameter is used to pass the trigger event data.
    • $context: this parameter is used to pass runtime information to your handler.

    Return and Exception

    Your handler can use return to return a value. The return value will be handled differently depending on the type of invocation when the function is invoked.

    • Sync invocation: when sync invocation is used, the return value will be serialized and returned to the invoker in JSON format. The invoker can get the returned value for subsequent handling. For example, the invoking method of function testing in the console is sync invocation, which can capture the function returned value and display it after the invocation is completed.
    • Async invocation: when async invocation is used, since the invoking method returns right after the function is triggered, it will not wait for the function to complete execution, and the returned value of the function will be discarded.

    In addition, the returned value will be displayed at the ret_msg position in the function log for both sync invocation and async invocation.
    You can exit the function by invoking die(). At this point, the function will be marked as "execution failed", and the output from the exit by using die() will also be recorded in the log.

    Log

    You can use the following statements in the program to output a log:

    • echo or echo()
    • print or print()
    • print_r()
    • var_dump()

    The output can be viewed at the log position in the function log.

    Installed Extensions

    The currently installed PHP extensions are listed below:

    • date
    • libxml
    • openssl
    • pcre
    • sqlite3
    • zlib
    • bcmath
    • bz2
    • calendar
    • ctype
    • curl
    • dom
    • hash
    • fileinfo
    • filter
    • ftp
    • SPL
    • iconv
    • json
    • mbstring
    • session
    • standard
    • mysqlnd
    • PDO
    • pdo_mysql
    • pdo_sqlite
    • Phar
    • posix
    • Reflection
    • mysqli
    • SimpleXML
    • soap
    • sockets
    • exif
    • tidy
    • tokenizer
    • xml
    • xmlreader
    • xmlwriter
    • zip
    • eio
    • protobuf
    • redis
    • Zend OPcache
    • mongodb
    • memcached
    • redis
    • gd2
    • ImageMagick
    • imagick
    • swoole (PHP7)

    You can also print and view the installed extensions at any time by using the print_r(get_loaded_extensions()); code.

    For more information on how to use relevant features, please see the following documents:

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