How to use the CLI mode of PHP7 to improve the execution efficiency of scripts?
PHP is a very popular server-side scripting language, and PHP7 is a major upgrade to the latest version in the PHP series. PHP7 not only provides many new features and improvements, but also introduces a command line interface (CLI) mode that can help developers better use PHP scripts for command line operations. This article will introduce how to effectively use the CLI mode of PHP7 to improve the execution efficiency of scripts, and provide some specific code examples.
- Using command line options
PHP scripts in CLI mode can receive parameters through command line options, allowing them to run more flexibly. The following are some commonly used command line options:
- -f
: Specify the PHP file to run. - -r
: Execute PHP code directly in the command line.
- -d
: Set PHP configuration options. - -c
: Specify the PHP configuration file. - -n: Do not use the php.ini configuration file.
- -m: Display installed extension modules.
For example, we can run a PHP script using the following command line options:
php -f script.php --argument1=value1 --argument2=value2
In a PHP script, we can use $_SERVER['argv']
and getopt()
function to get the incoming command line parameters. Here is a simple example:
<?php $options = getopt("a:b:c:"); var_dump($options); ?>
Run command:
php -f script.php -a value1 -b value2 -c value3
Output:
array(3) { ['a'] => string(6) "value1" ['b'] => string(6) "value2" ['c'] => string(6) "value3" }
- Multi-threading
In PHP7 Previously, PHP was single-threaded, which meant scripts could execute less efficiently when processing large amounts of data. However, PHP7's CLI mode supports multi-threading and can handle multiple tasks at the same time, thereby improving script execution efficiency.
Using PHP to extend the thread pool can more easily implement multi-thread processing. The following is an example of using the thread pool to process tasks:
<?php function worker($arg) { // 处理任务 return $result; } $pool = new Pool(4); $pool->submit(new Worker('worker', $arg1)); $pool->submit(new Worker('worker', $arg2)); $pool->submit(new Worker('worker', $arg3)); $pool->submit(new Worker('worker', $arg4)); $pool->shutdown(); ?>
In the above example, we used the thread pool to create 4 thread, and submitted 4 tasks respectively. Each task will be assigned to an available thread for processing without blocking the execution of other tasks.
- Using the new features of PHP7
PHP7 introduces some new features and improvements that can help improve the execution efficiency of scripts.
- Strongly typed declarations: Using type declarations in function parameters and return values can reduce runtime errors and improve code reliability and performance.
<?php function add(int $a, int $b): int { return $a + $b; } ?>
- Declaring typed properties: Using type declarations in properties of a class can improve the type safety of the property and reduce runtime errors.
<?php class MyClass { public int $number; } ?>
- Optimized error handling: PHP7 introduces the
Throwable
interface, which can catch and handle exceptions and errors without using different exception classes and error classes.
<?php try { // 代码块 } catch (Throwable $e) { // 异常和错误处理 } ?>
To sum up, the CLI mode of PHP7 provides many functions and improvements that can help developers better use PHP scripts for command line operations. By using command line options, multi-threading, and new features, we can improve the execution efficiency of PHP scripts, thereby improving overall performance and user experience.
The above is the detailed content of How to use PHP7's CLI mode to improve script execution efficiency?. For more information, please follow other related articles on the PHP Chinese website!

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SublimeText3 Linux new version
SublimeText3 Linux latest version

SublimeText3 Chinese version
Chinese version, very easy to use

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Mac version
God-level code editing software (SublimeText3)
