10 recommended articles about php trim() function

The string function trim() removes blank characters or other predefined characters on both sides of the string. This is very important in our program development. This article has published several articles about the PHP string function trim(). ) usage summary, I hope it will be helpful for everyone to understand the trim() function, let’s take a look. 1. The PHP function trim(), which removes spaces and special characters from the beginning and end of strings, usually allows users to enter data in forms or other text boxes. Spaces or other special characters may be entered accidentally, etc. In some cases, spaces and special characters are not allowed in the string. In this case, you need to use something to remove these spaces and special characters. PHP provides the trim() function to remove spaces and special characters on the left and right sides of a string, the ltrim() function to remove spaces and special characters on the left side of a string, and the rtrim() function to remove spaces and special characters on the right side of a string. These operations can be easily performed using these PHP built-in functions. The following introduces the syntax and usage of these functions. 2. Weird phenomena in the use of PHP function rtrim() Today I use rtr

1.Summary of usage of PHP string function trim()

Introduction: The string function trim() removes blank characters or other predefined characters on both sides of the string, which is very important in our program development. Importantly, this article has collected several articles about the usage of the PHP string function trim(). I hope it will be helpful to everyone's understanding of the trim() function. Let's take a look.

2.Detailed explanation of usage examples of java trim

##Introduction: The rim method is generally used to remove spaces, but according to the JDK API description, this method is not just about removing spaces, it can remove all characters from encoding '\u0000' to '\u0020'. Carriage return and line feed are also among these 20 characters. The following is an example:

3.Detailed explanation of String.trim() method examples in Java

Introduction: Java String.trim() method usage example tutorial, this method returns a copy of the beginning and end of the string Remove white spaces or string if it has no leading or trailing white spaces.

4.Share examples of TrimHelper methods in Java

##Introduction: The main function of the trim() method we generally use is to remove the leading and trailing spaces of the string. However, according to my personal practical experience, I found that the trim() method can only remove some spaces or whitespace characters, such as half-width spaces; for full-width spaces, trim() cannot remove them. So at this time, you need to use regular expressions to remove the leading and trailing spaces, whitespace characters, newline characters or tab characters, newline characters, etc.

5.

mysql text processing function Example (Use of data processing function 1)

##Introduction: Text processing function We have said before that it is used The rtrim() function that removes spaces at the end of a string is the function used to process this article. Next we introduce another function, the upper() function:

6.

Introduction to sql data processing functions

Introduction: What is a function? Like most other computer languages, SQL supports the use of functions to process data. Functions are generally executed on data, which provides convenience for data conversion and processing. For example, rtrim(), which is used to remove spaces at the end of a string, is an example of a function.

7.The PHP function trim() to remove leading and trailing spaces and special characters from a string

Introduction: When users enter data, they may enter spaces or other special characters. In some cases, spaces and special characters are not allowed in the string, and these spaces and special characters need to be removed.

8.Detailed introduction to the method summary of replace in javascript

##Introduction: This article mainly introduces the use of replace in JavaScript in detail. Using replace and regular expressions to jointly implement the string trim method has certain reference value. Interested friends can Please refer to

9.php example code for clicking on the current page to download a file

##Introduction: The code in the php controller public function downFile($path = ''){ if(!$path) header("Location: /"); download($path); }download File download function code function download($file_url,$new_name=''){ if(!isset($file_url)||trim($file_url)==''){ echo '500'; }

10.

Strange phenomena in the use of PHP function rtrim()

# #Introduction: This article mainly introduces the weird phenomena in the use of PHP function rtrim(), and analyzes the problems and solutions that arise in the character matching process of PHP function rtrim in the form of specific examples, which will help to further understand the rtrim function. For principles and usage tips, friends in need can refer to

[Related Q&A recommendations]:

php - trim function's processing of full-width spaces

java - Determine the type of string content

javascript - Under what circumstances will js block?

javascript - Prohibit form submission when the input content is empty

javascript - When writing a website with thinkphp, I find that there always appears in the front-end body Unknown bytes.

The above is the detailed content of 10 recommended articles about php trim() function. For more information, please follow other related articles on the PHP Chinese website!