How php deletes a character in a string

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Methods to delete characters: 1. Use str_replace() function, syntax "str_replace(specify character,'', $str)";2. Use substr_replace() function, syntax "substr_replace($str,'', specify character position,1)".

Operating environment of this tutorial: Windows 7 system, PHP 7.1 version, DELL G3 computer

Php method to delete a character in a string

Method 1: Delete the specified character

In PHP, str_replace () and str_replace a specified string (character) in the original string with a new string; when the replacement value is set to the null character '', the specified character is deleted.

Note: str_replace is case sensitive, str_replace () is case insensitive.

Example 1: Using str_replace()

Output:

bcdefgACabcdefgC

Example 2: Using str_replace ()

Output:

bcdefgCbcdefgC

Method 2: Delete characters at specified positions

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

The syntax of the substr_replace() function is as follows:

mixed substr_replace ( mixed $string , mixed $replacement , mixed $start [, mixed $length ] )

substr_replace() replaces the substring qualified by the start and optional length parameters with replacement in a copy of string. If the replacement value is the null character '', characters of length can be deleted.

Examples:

Output:

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