How to replace string from specified position in php

In PHP, you can use the "substr_replace" function to replace a string from a specified position. The syntax is "substr_replace(string,replacement,start,length)". The parameter start means to start replacing from the specified position.

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php method to replace characters starting from the specified position

Definition and usage

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

Syntax

substr_replace(string,replacement,start,length)
echo substr_replace("hello world","earth",6);

Parameters

string Required. Specifies the string to check.

replacement Required. Specifies the string to be inserted.

start

Required. Specifies where in the string to begin replacement.

Positive numbers - replace at the start offset

Negative numbers - replace at the start offset from the end of the string

0 - replace at the character Start replacing

charlist

from the first character in the string. Optional. Specifies how many characters to replace.

Positive number - the length of the string to be replaced

Negative number - the number of characters to be replaced from the end of the string

0 - insert instead of replace

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