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Technical Articles

Web Front-end

How to convert complex LaTeX formulas into code that can be used for logical calculations?

Tools for converting LaTeX formulas into code logic Explore LaTeX formulas often need to convert LaTeX formulas into logical calculations when performing scientific calculations or programming...

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How to use Python regular expressions to avoid missing characters matching results?

How to avoid missing characters when using Python regular expressions? Sometimes I encounter string matching using Python's regular expressions...

Apr 01, 2025 pm 05:39 PM

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ThinkPHP6 routing: How to completely obtain URL parameters containing special characters such as Chinese?

ThinkPHP6 routing parameters are processed in Chinese and complete acquisition. In the ThinkPHP6 framework, URL parameters containing special characters (such as Chinese and punctuation marks) are often processed...

Apr 01, 2025 pm 02:51 PM

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How to efficiently replace tags in HTML strings in PHP?

Efficiently replace tags in HTML strings This article will explore how to efficiently replace specific tags in HTML strings using PHP code, such as h1 and div tags...

Apr 01, 2025 pm 01:45 PM

How to process multi-layered brackets in LaTeX formulas with Python regular expressions and LaTeX parsing library?

Python regular expressions handle LaTeX multi-layer brackets and build multi-dimensional dictionaries with many LaTeX...

Apr 01, 2025 pm 12:45 PM

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How to effectively limit and control the number of people being tagged when parsing @ users?

How to limit and control the number of people when parsing @ users? Limit and control the number of users who are a user-friendly service on social media or forum platforms...

Apr 01, 2025 pm 12:27 PM

Regular expressions around-view assertion preview: How to correctly use forward and reverse preview?

Correct use of regular expressions to view, assert and pre-check This article will explore in-depth the use of lookaround, assert and pre-check in regular expressions, �...

Apr 01, 2025 am 10:51 AM

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How to dynamically read MySQL database fields using PHP variables?

Flexible use of PHP variables to read MySQL field names. During the interaction between PHP and MySQL database, it is often necessary to read database fields dynamically. This article will be detailed...

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$How to match @usernames outside of the \[url\] tag without using assertions?$

How to match @usernames outside of the \[url\] tag without using assertions?

How to match @ users that are not outside of [url] tags without using assertions? When dealing with string matching, we often encounter situations where we need to extract a specific pattern. ...

Apr 01, 2025 am 09:39 AM

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How to efficiently parse multi-layer nested brackets in LaTeX formulas and convert them into multi-dimensional dictionary?

Python parses LaTeX multi-layer brackets: build multi-dimensional dictionary many LaTeX...

Apr 01, 2025 am 08:57 AM

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How to configure only allow access to index.php files in Nginx?

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I’ve learned to be more comfortable not knowing. “I don’t know”, comes easier now. “I don’t know anything about that.” It’s okay. It feels good to say.

Apr 01, 2025 am 04:12 AM

JavaScript Regex Cheat Sheet

Proficient in using regular expressions requires understanding the purpose of each special character, flag, and method. This quick lookup table summarizes the usage of JavaScript regular expressions, which is convenient for you to check at any time. Create regular expressions in JavaScript var regex = new RegExp('\u{61}', 'u'); console.log(regex.unicode); // true Sticky Search The lastIndex property indicates the starting position of the search. [Back to top] Parentheses in regular expressions Brackets are used for grouping. Sub-patterns can be formed using match() and replace() methods. split(

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SFTP Port Forwarding: Enabling Suppressed Functionality

introduction The SSH protocol supports three major categories of remote server activities: a) command execution (including login shell), b) network forwarding and operation, and c) file transfer. OpenSSH maintainers have determined that sftp and scp have no legal purpose for port forwarding (via the -L and -R options). During file transfer using these utilities, a flag that explicitly disables these features is passed unconditionally to the child SSH executable. Some users may indeed need these features. An obvious subset is the penetration testers whose task is to verify that this feature is explicitly disabled on a public SFTP server. Here are two techniques to enable these suppressed functions by modifying the sftp binary file

Mar 17, 2025 am 09:43 AM