This article explains two common ways to read files in PHP—file_get_contents and fread. It includes practical examples for reading local, remote, and binary files, making it ideal for beginners and developers.

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file_get_contents is a very common function used to read file contents, including cache files. When we store the serialized data into a cache file, we usually need to use the unserialize function to restore the string to PHP variables when reading it, so that we can continue to operate on the data.

Reading file content is a very common operation in development. The file() and file_get_contents() functions are two commonly used functions for reading files, but they differ in their return values, use cases, and performance. This article will compare the differences between them in detail and provide suggestions for selection.

In PHP, operating files is a common requirement, and ensuring that files can be read safely is a key step to avoid program errors and security risks. This article will introduce how to combine the is_readable function and the file_get_contents function to determine whether a file can be read safely.

This article delves into core PHP performance optimization techniques, including Opcode caching, database caching, and code optimization, helping developers significantly enhance the response speed and user experience of web applications. By applying practical optimization strategies, it improves page load efficiency and API response times, ensuring smooth and efficient user interactions.

file_get_contents() is a convenient file reading function whose basic function is to read the entire content of a file and return it. It is typically used for reading text files and is also very suitable for small binary files. However, for large files or compressed files, the efficiency and applicability of this function may be limited.

How to Handle Memory Issues When Using file_get_contents to Read Large Files? A Detailed Explanation of Causes and Solutions

How to Use PHP file_get_contents to Fetch Webpage Content from a Remote URL Explained

curl_share_errno is a function specifically designed to retrieve error codes for shared cURL handles. cURL provides powerful networking capabilities, and shared handles (curl share) allow multiple cURL handles to share data such as cookies, DNS cache, etc., improving request efficiency. When there is an issue with the shared handle, the curl_share_errno function can be used to obtain specific error codes, which aids in debugging and exception handling.

In PHP development, we often need to dynamically load files and read their contents. get_include_path() and file_get_contents() are two very practical functions that can be used in combination to easily read file contents included in the include path of PHP. This article will explain in detail how to use these two functions to dynamically load and read file content.

We often encounter scenarios where we need to read the content of a file frequently. Every time a file is read, I/O operations may involve, especially when the files are large or requested frequently, this operation can lead to performance bottlenecks. To improve performance, the cache mechanism can be used to cache the file contents into memory to avoid multiple readings of the file. APCu (Alternative PHP Cache) is a very effective caching solution that can store data in memory and improve application performance.

File integrity verification is an important part when transferring, downloading or storing files. By calculating the hash value of the file and comparing it with the expected value, we can effectively detect whether the file has been tampered with or corrupted. The hash_final function can stream files with hash_init and hash_update, while file_get_contents can read file contents at one time. This article will take you through how to combine these two to complete file integrity verification.

File hashing calculations in PHP are a common requirement, especially when verifying file integrity or encryption processing. This article will introduce how to combine hash_final and file_get_contents to implement hash calculation of files.