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This article Xiaobian for you to introduce in detail "php how to remove the middle of several characters", the content is detailed, the steps are clear, the details are handled properly, I hope this "php how to remove the middle of several characters" article can help you solve doubts, following the editor's ideas slowly in-depth, together to learn new knowledge.

In PHP, you can use the "substr_replace ()" function to remove the middle characters, which is used to replace part of a string with another string, just set the replaced part to empty, and the syntax is "substr_replace (string,", remove the character position, remove the number of characters).

This article operating environment: Windows10 system, PHP7.1 version, Dell G3 computer

How does php remove the middle characters?

The substr_replace () function replaces part of a string with another string.

If the start parameter is negative and length is less than or equal to start, length is 0.

This function is binary secure.

Grammar

Substr_replace (string,replacement,start,length)

String is required. Specifies the string to check.

Replacement is required. Specifies the string to insert.

Start is required. Specifies where to start the replacement of the string. Positive number-starts at the specified position in the string, negative number-starts at the specified position at the end of the string, 0-starts at the first character in the string

Length is optional. Specifies how many characters to replace. The default is the same length as the string. Positive number-length of string to be replaced, negative number-number of characters replaced from the end of the string, 0-insert instead of replace

Return value: returns the string to be replaced. If string is an array, an array is returned.

Examples are as follows:

Output result:

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