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- What is the difference between php7 and php5 syntax
- The syntax differences between php7 and php5 are: 1. PHP7 introduces strict type declarations, while the type of PHP5 variables is implicit; 2. PHP7 introduces support for scalar type declarations, but PHP5 does not; 3. PHP7 introduces NULL Merge operator, while PHP5 checks whether a variable exists and is not null, you need to use a conditional statement; 4. PHP7 adds a new comparison operator "<=>", but PHP5 does not; 5. PHP7 introduces a new feature anonymous class , while PHP5 does not.
- PHP Problem 989 2023-07-10 15:25:03
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- What are the ways to write php+ comments?
- PHP+ comment writing methods are: 1. Single-line comments, used to add a line of comments in the code, starting with a double slash "//", followed by the content of the comment; 2. Multi-line comments, used to add multiple lines of comments in the code , starting with a slash and an asterisk "/*" and ending with an asterisk and a slash "*/"; 3. Documentation comments, used to add detailed comments to functions, classes and methods, starting with a slash and two asterisks It starts with "/**" and ends with an asterisk and a slash "*/".
- PHP Problem 1770 2023-07-10 15:15:44
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- What should I do if the running results are different depending on the PHP version?
- Solutions for different PHP versions with different running results: 1. Need to understand the differences between PHP versions and make corresponding code modifications; 2. Use conditional statements and Polyfill libraries to deal with compatibility issues of different PHP versions; 3. Use detection tools Conduct code inspections and static analysis, and conduct adequate testing to discover and resolve possible compatibility issues.
- PHP Problem 1097 2023-07-10 15:08:57
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- Is php suitable for vue or react?
- Choosing to use Vue or React depends on needs and personal preferences: 1. If you like a simple and easy-to-learn framework, Vue may be a good choice, with clear documentation and intuitive API, making the development process more intuitive and faster; 2. If a robust and wider community-supported framework is preferred, React may be a better choice, with a large number of third-party libraries and components available to suit a variety of needs. Whichever framework you choose, works well with PHP. .
- PHP Problem 1024 2023-07-10 15:08:31
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- What is the reason for the php database interface?
- The reasons for the PHP database interface are: 1. Allow effective communication and interaction between PHP and the database, send queries and obtain results, and realize the addition, deletion, modification and query of data; 2. Enable PHP to better utilize the functions of the database and use the database Efficient data storage and management functions; 3. Make it easier to integrate PHP with other development technologies and tools, and conveniently integrate and interact with other technologies; 4. Provide protection for the security and integrity of the database, and provide The function of validating and filtering data effectively prevents security vulnerabilities such as SQL injection.
- PHP Problem 1408 2023-07-10 14:56:50
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- How to solve the 500 error in dede+php low version
- Solution to 500 error in dede+php low version: 1. Use the latest version of PHP. The latest version of PHP includes more features and tools, which can help you develop applications more easily; 2. Check the error log to determine the error The specific location and reason; 3. Check the PHP extensions and make sure they are the latest version and compatible with your PHP version.
- PHP Problem 1061 2023-07-10 14:55:15
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- How to convert timestamp to format in php
- There are three ways to convert a timestamp to a format in PHP, which are: 1. Use PHP's built-in function "date()", select the time format option as needed, and perform conversion; 2. Use the "createFromFormat()" of the DateTime class method to convert the timestamp into a DateTime object, and then use the "format()" method to format it; 3. Use PHP's "strftime()" function to format the timestamp into the corresponding date and time according to the system localization settings. Time string.
- PHP Problem 2092 2023-07-10 14:46:31
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- How to remove styles in editor in php+
- Methods to remove styles in the editor in php+: 1. Remove HTML tags by passing the text content output by the editor to the strip_tags() function; 2. Use the strip_tags() function and regular expressions to remove styles; 3. Combine with HTML parsing The library handles more complex cases.
- PHP Problem 1644 2023-07-10 14:26:33
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- How to determine the number of foreach loop in php
- The steps for PHP to determine the number of the foreach loop: 1. Create an array of "$fruits"; 2. Create a counter variable "$counter" with an initial value of 0; 3. Use "foreach" to loop through the array, and Increase the value of the counter variable in the loop body, and then output each element and their index; 4. Output the value of the counter variable outside the "foreach" loop to confirm which element the loop reaches.
- PHP Problem 1607 2023-07-10 14:18:54
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- What should I do if the PHP login jump does not display the content?
- PHP login jump does not display content solutions: 1. Check the code of the login function; 2. Check the target page after the jump; 3. Check the log file of the web page or application; 4. You can also temporarily add some debugging to the code information; 5. Consider using debugging tools and techniques; 6. Seek help from other developers.
- PHP Problem 1420 2023-07-10 14:15:42
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- What should I do if Php5 cannot open the php7 website?
- Solution to why Php5 cannot open a php7 website: 1. Use version control tools (such as Git) to manage code; 2. Use tools to automatically detect code that may be incompatible with PHP7; 3. Consult PHP official documentation and PHP community forums. Upgrade guides and suggestions; 4. Consider seeking help from professional PHP developers.
- PHP Problem 1120 2023-07-10 14:01:18
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- What should I do if PHP cannot obtain data after installing SSL certificate in IIS?
- Solution to iis installing ssl certificate and php unable to obtain data: 1. Check IIS and PHP configuration; 2. Ensure the certificate is installed correctly; 3. Update the PHP version; 4. Check permission issues; 5. Check firewall and port settings; 6. Contact the host Contact your vendor or certificate authority.
- PHP Problem 1542 2023-07-10 13:53:50
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- How to hide php parameters
- Methods to hide parameters in PHP: 1. Use the POST method to pass parameters and pass the parameters to the server as the body of the request. The parameters will not be visible on the URL; 2. Use SESSION to store parameters and store the parameter values in SESSION; 3. Use encryption and decryption to convert the parameter value into an unreadable form; 4. Use a hash algorithm to convert the parameter value into a fixed-length hash value.
- PHP Problem 2037 2023-07-10 13:48:31
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- What are the PHP conversion functions?
- PHP conversion functions include: 1. intval() function; 2. floatval() function; 3. strval() function; 4. boolval() function; 5. serialize() function and unserialize() function; 6. json_encode() function and the json_decode() function.
- PHP Problem 1394 2023-07-10 13:37:52
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- How to solve Chinese garbled characters when converting php16 to string
- Solution to Chinese garbled characters converted from hexadecimal to string in php: 1. Use hex2bin function to convert hexadecimal to string; 2. Use mb_internal_encoding function to set character encoding; 3. Use urlencode function to convert string into URL encoding form, use The urldecode function converts the URL encoding back to a string; 4. Use the iconv function to convert characters from one encoding to another.
- PHP Problem 1886 2023-07-20 10:18:37
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