PHP string functions are used to manipulate string data. The most common string functions include the following:
| PHP String Function | Description |
|---|
| addslashes() | Adds slashes to specified characters in a string. |
| echo() | Outputs one or more strings. |
| explode() | Splits a string into multiple strings based on the specified delimiter. |
| htmlentities() | Converts characters into corresponding HTML entities. |
| htmlspecialchars() | Converts 5 characters into corresponding HTML entities. |
| implode() | Joins array elements with a specified delimiter. |
| md5() | Calculates the md5 hash of a string. |
| number_format() | Sets the format of a numerical output. |
| print() | Outputs one or more strings. |
| str_replace() | Changes certain occurrances on a string with a replacement string. |
| strlen() | Returns the length of a string. |
| strpos() | Finds the position of the first match in a string. |
| strstr() | Returns all characters of a string after the first match. |
| substr() | Retrieves a portion of the string. |
| trim() | Strips out white spaces at both ends of a string. |