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String Insertion Functions

Author : sleek

The following functions are used to insert a string into another string.

str_insert() - Insert a single string into another string
str_multi_insert() - Insert any number of strings into another string

PHP Example :

<?php function str_insert($insert, $string, $index) { $prefix = substr($string, 0, $index); $suffix = substr($string, $index); return $prefix.$insert.$suffix; } function str_multi_insert($inserts, $string) { // If the $inserts is not an array or there is nothing to insert, return the original string if (!is_array($inserts) || count($inserts) == 0) { return $string; } $strlen = strlen($string); // Check for negative indices and handle them properly foreach ($inserts as $index => $insert) { if ($index < 0) { $new_index = $strlen + $index; // Still less than 0, so just make it 0 if ($new_index < 0) { $new_index = 0; } $inserts[$new_index] = $insert; unset($inserts[$index]); } } ksort($inserts); $new_string = ''; $prev_index = 0; foreach ($inserts as $index => $insert) { $tmp = substr($string, $prev_index, $index - $prev_index); $new_string .= $tmp.$insert; $prev_index = $index; } $new_string .= substr($string, $prev_index); return $new_string; } ?>

Usage Example:

PHP Example :
	`<?php $string = 'I am a genius.'; // Produces the string: 'I am a PHP genius.' echo str_insert('PHP ', $string, 7); $string = '8002223334'; $inserts = array( 0 => '(', 3 => ') ', 6 => '-' ); // Produces the string: (800) 222-3334 echo str_multi_insert($inserts, $string); ?>`