array function
array_chunk //Split an array into multiple arrays
array_key_exists //Check whether the given key name or index exists in the array
array_keys //Return all the key names in the array and form New array
array_merge // Merge one or more arrays, rebuild the index
array_values // Sort the array in reverse order and keep the index Relationship
asort . //Return the current key/value in the array and move the array pointer forward One step /End // point the internal pointer of the array to the last unit
extract // from the array to the current symbol table (the key name is the name of the variable, the key value is the value of the variable)
In_array // Check the inspection Whether a certain value exists in the array
key // Sort the array by key name
list Some variables,
next // Move the internal pointer in the array forward by one position A unit
sort ; SORT_REGULAR - Normal comparison of units (no change of type), SORT_NUMERIC - Units are compared as numbers, units are compared as strings, units are compared as strings according to the current locale settings
Time date row number
date
gmdate
gmmktime
microtime
time
File system function
basename
chmod
copy
delete/unlink
dirname
fopen/flock/fread/fwrite/fclose
file_exists
file_get_contents
file_put_contents
file
fileatime
filemtime
filesize
ftruncate
is_dir
is_file
is_readable
is_uploaded_file
is_writable
mkdir
move_uploaded_file
rename
rmdir
touch
unlink
mathematical function
abs
ceil
floor
max
min
Mysql function
mysql_connect/mysql_pconnect
mysql_error
mysql_errno
mysql_fetch_array
mysql_fetch_field
mysql_fetch_row
mysql_insert_id
mysql_query
String processing function
addslashes
echo
explode
join
md5
print
//sprintf
str_replace
strstr
strip_tags
stripslashes
strlen
strpos
strtolower
strtouper
substr
trim
URL function library
base64_decode
base64_encode
rawurldecode
rawurlencode
urldecode
urlencode
Variable function
empty
floatval
get_defined_vars
gettype
intval
is_array
is_bool
is_float
is_int
is_null
is_numeric
is_object
is_resource
is_string
isset
print_r
settype
strval
unset
var_dump
php.ini
short_open_tag on
asp_tags off
disable_functions
display_errors on
track_errors on
register_globals off
post_max_size
extension_dir = "./ext"
enable_dl off
extension=php_gd2.dll
extension=php_mbstring.dll
extension=php_mysql.dll
PHP: An Introduction to the Server-Side Scripting LanguageApr 16, 2025 am 12:18 AMPHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.
PHP and the Web: Exploring its Long-Term ImpactApr 16, 2025 am 12:17 AMPHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.
Why Use PHP? Advantages and Benefits ExplainedApr 16, 2025 am 12:16 AMThe core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.
Debunking the Myths: Is PHP Really a Dead Language?Apr 16, 2025 am 12:15 AMPHP is not dead. 1) The PHP community actively solves performance and security issues, and PHP7.x improves performance. 2) PHP is suitable for modern web development and is widely used in large websites. 3) PHP is easy to learn and the server performs well, but the type system is not as strict as static languages. 4) PHP is still important in the fields of content management and e-commerce, and the ecosystem continues to evolve. 5) Optimize performance through OPcache and APC, and use OOP and design patterns to improve code quality.
The PHP vs. Python Debate: Which is Better?Apr 16, 2025 am 12:03 AMPHP and Python have their own advantages and disadvantages, and the choice depends on the project requirements. 1) PHP is suitable for web development, easy to learn, rich community resources, but the syntax is not modern enough, and performance and security need to be paid attention to. 2) Python is suitable for data science and machine learning, with concise syntax and easy to learn, but there are bottlenecks in execution speed and memory management.
PHP's Purpose: Building Dynamic WebsitesApr 15, 2025 am 12:18 AMPHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.
PHP: Handling Databases and Server-Side LogicApr 15, 2025 am 12:15 AMPHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.
How do you prevent SQL Injection in PHP? (Prepared statements, PDO)Apr 15, 2025 am 12:15 AMUsing 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.
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