Insert a character at a certain position in a string.

insert_char_in_string.php

<?php

/**
 * Insert a character at a certain position in a string
 *
 * @param string $char : The character to insert.
 * @param string $string : The input string.
 * @param int|string $position : The position of the insertion; if the position is set to 'random', than the position will be ... random ...
 * @return string
 * @author Aziz Light
 */
function insert_char_in_string( $char = '', $string = '', $position = 'random' )
{
	if ( ( int ) $position > 0 )
		$position--;
	elseif ( ( int ) $position < 0 )
		$position = strlen( $string ) - abs( $position );
	elseif ( ( string ) trim( $position ) == 'random' )
		$position = mt_rand( 0, ( strlen( $string ) - 1 ) );
	
	return ( $position == 0 ) ? substr_replace( $string, $char . $string[$position], $position, 1 ) : substr_replace( $string, $string[$position] . $char, $position, 1 );
} // End of insert_char_in_string