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This article mainly explains "how to delete a specified substring in a string with php". The explanation in the article is simple and clear and easy to learn and understand. Please follow Xiaobian's train of thought to study and learn "how to delete a specified substring in a string with php".

Methods: 1, use str_replace () to delete in a case-sensitive way, syntax "str_replace (substring,'', string)"; 2, use str_ireplace () to delete in a case-insensitive way, syntax "str_ireplace (substring,'', string)".

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, to delete a specified substring from a string, you can replace the specified substring in a string with an empty string''.

Instead of replacing the specified substring, you can use the str_ireplace () and str_replace functions, both of which replace the specific string specified in the original string with the new string. Str_replace is case-sensitive, str_ireplace () is not case-sensitive, and the syntax is similar:

The str_replace (find,replace,string,count) str_ireplace (find,replace,string,count) parameter is required to describe find. Specifies the value to look for. Replace is required. Specifies the value that replaces the value in find. String is required. Specifies the string to be searched. Count is optional. A variable that counts the number of substitutions.

You just need to set the replace parameter value to the empty string''.

Example 1: use the str_replace () function to remove the specified substring "hello"

Output result:

Example 2: use the str_ireplace () function to remove the specified substring "hello"

Output result:

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