如何从参数文件中读取内容并替换变量值
A.TXT内容如下
01:富裕
02:一般
03:贫穷
C.TXT内容如下
01:中国
02:美国
03:德国
04:法国
05:葡萄牙
php文件中
$a1=02
$a2=01
$a3=03
$c1=01
$c2=03
$c3=05
请问如何将a开头的变量都替换成A.TXT中的富裕程度,将c开头的变量都替换成国家名字?
回复讨论(解决方案)
file_get_contents函数读取txt内容
首先explode("\r\n", $txt)分行
遍历上一步结果,再用explode拆冒号
得到一个数组:array('01' => '富裕', '02' => '一般')
剩下就好办了
这个思路我考虑过,给这么多分的原因是想要一个很优化的方案,因为配置文件多且大,每个变量要遍历一遍,速度很慢。
$a1 = '02';$a2 = '01';$a3 = '03';$c1 = '01';$c2 = '03';$c3 = '05';$na = 'a';parse_str(str_replace(array(':', PHP_EOL), array('=', '&'), file_get_contents("data/$na.txt")), $ar);foreach(preg_grep("/^$na\d+/", array_keys(get_defined_vars())) as $v) { $$v = $ar[$$v];}$na = 'c';parse_str(str_replace(array(':', PHP_EOL), array('=', '&'), file_get_contents("data/$na.txt")), $ar);foreach(preg_grep("/^$na\d+/", array_keys(get_defined_vars())) as $v) { $$v = $ar[$$v];}echo $a1, PHP_EOL;echo $a2, PHP_EOL;echo $a3, PHP_EOL;echo $c1, PHP_EOL;echo $c2, PHP_EOL;echo $c3, PHP_EOL;
富裕
贫穷
中国
德国
葡萄牙
你的方案就是错的,不可能获得良好的性能
想要优化?
将txt中的原格式转换到易用的php数组后,用内置的序列化函数生成字符串再保存回去
这样后面省去了解析的过程
但这个东西重点在于大文件的IO上,要么换mysql,要么用memcache

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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

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

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

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

Hot Topics











In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
