Found a total of 10000 related content
How do I create a new model in Yii?
Article Introduction：There are two main ways to create models in the Yii framework: 1. Use Gii to automatically generate models, and you can generate model classes and CRUD code by enabling Gii tools and accessing its interface to enter table names and class names; 2. Create a model file manually, create a new PHP file in models/ directory and define a class inherited from yii\db\ActiveRecord, and implement tableName(), rules(), attributeLabels() and other methods; in addition, you need to pay attention to the model naming specifications, automatic filling fields, model locations, and the difference between AR and non-AR models, and choose the appropriate method according to actual needs.
2025-07-14
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352
php change date format in string
Article Introduction：There are two common methods for converting date formats in PHP: one is to use strtotime() with the date() function, such as converting "2024-12-31" to "December31,2024"; the other is the more recommended DateTime class, which supports more formats and is more reliable, such as using newDateTime() to parse standard formats or DateTime::createFromFormat() to process non-standard formats. In addition, time zone issues need to be set through date_default_timezone_set(), while localized displays can be used for IntlDateForma
2025-07-06
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364
php convert yyyy-mm-dd to dd-mm-yyyy
Article Introduction：There are three main ways to convert date formats in PHP. 1. Use date and strtotime to combine to be suitable for simple conversion in standard formats, such as converting yyyy-mm-dd to dd-mm-yyyy; 2. Use the DateTime class to be suitable for handling complex scenarios such as addition and subtraction days or object-oriented style development; 3. Non-standard formats can be regularly extracted or introduced into third-party libraries such as Carbon to parse and format output.
2025-07-04
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410
Including and Requiring Files in PHP: Syntax Variations
Article Introduction：The difference between include and require in PHP is in the error handling method: if include fails, warning will be issued and execution will be continued, and if require fails, fatalerror will be triggered and the script will be terminated; if _once is used to avoid repeated loading; if key files are used to require or require_once, non-critical files are used to include or include_once; class libraries are recommended to use _once; paths are recommended to use __DIR__ stitching.
2025-07-16
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824
php calculate age from date of birth
Article Introduction：The core method of calculating age with PHP is to use the DateTime class and the diff() method. The steps are: 1. Create a DateTime instance of the date of birth and the current date; 2. Call diff() to obtain the time difference and extract the year difference; 3. Pay attention to dealing with non-standard date format and time zone issues. In the specific implementation, it is necessary to ensure that the date format is standardized. You can use strtotime() to convert non-standard formats and clean up Chinese characters through preprocessing. It is recommended to add verification logic; if global users are involved, the DateTime time zone should be manually set to avoid calculation errors caused by server time zone differences, thereby ensuring the accuracy and reliability of age calculations.
2025-07-15
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265
php regex performance
Article Introduction：The key to PHP regular expression performance optimization is to reduce the number of backtracking and matches; 1. Avoid greedy matching and backtracking, use non-greedy patterns, avoid nested quantifiers, and reduce the use of capture groups; 2. Compile regular expressions in advance, and use static variables or class constant storage to reduce the overhead of repeated parsing; 3. Prioritize string functions to replace simple matching tasks, such as strpos, substr, etc. to improve efficiency; 4. Use anchor points and boundary control characters such as ^, $, and \b to limit the matching range to speed up the engine judgment.
2025-07-06
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447
PHP Master | Exceptional Exceptions
Article Introduction：Core points
PHP exception is a special class that can be thrown and caught to indicate unexpected events. Unlike unrecoverable errors, exceptions are intended to be processed by the calling code and bubble upward along the execution chain until they are caught.
The difference between PHP errors and exceptions is that the error is irrecoverable and occurs in the main execution loop, indicating that there is a problem with the stability of the code or environment; while the exception is recoverable and may occur outside the main execution loop, and does not indicate the system. Unstable.
Not all non-successful situations require exceptions to be thrown. Exceptions should be thrown only if they really cannot continue execution. This means that an action that is not a normal operation or standard, an abnormality, deviates from normal and expected situations.
Throw a general Exception
2025-02-25
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778
php convert date format
Article Introduction：PHP date format conversion is mainly implemented in two ways. First, use the combination of date() and strtotime() functions, which are suitable for most standard format conversions, but have limited support for non-standard formats; second, use the DateTime class to deal with more complex scenarios, such as time zone conversion and multilingual support, which has stronger readability and fault tolerance; in addition, you also need to master common format characters, such as Y represents a four-bit year, m represents a month with a leading zero, and d represents a date with a leading zero, etc.; it is recommended to use date() in simple scenarios, and DateTime is preferred if it involves time zone or internationalization, and pay attention to verifying the legitimacy of the input.
2025-07-07
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896
Including Files in PHP
Article Introduction：The difference between include and require in PHP is in error handling: when include error occurs, it will issue a warning and continue execution, suitable for non-core files; when require error occurs, it will trigger a fatal error and stop the script, suitable for core files. 1. include_once and require_once can avoid duplicate inclusion and are suitable for function libraries, configuration files, etc. 2. It is recommended to use __DIR__ to build a stable path to prevent path errors. 3. Sensitive files should be prohibited from external access to prevent information leakage. 4. It is recommended to use require_once for the core class library to ensure that it is loaded without duplication. 5. In terms of performance include/require is slightly faster, but the differences can be made in actual development.
2025-07-18
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750
Dave The Diver: How To Catch Spider Crabs
Article Introduction：In Dave The Diver, there are some creatures that are not easy to catch. Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up w
2025-01-10
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853
Prepare for Interview Like a Pro with Interview Questions CLI
Article Introduction：Prepare for Interview Like a Pro with Interview Questions CLI
What is the Interview Questions CLI?
The Interview Questions CLI is a command-line tool designed for JavaScript learners and developers who want to enhance their interview
2025-01-10
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1484
Soft Deletes in Databases: To Use or Not to Use?
Article Introduction：Soft Deletes: A Question of DesignThe topic of soft deletes, a mechanism that "flags" records as deleted instead of physically removing them, has...
2025-01-10
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1081
