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PHP-MySQL Connectivity
Strings are the collection of Characters. Common Built-in PHP String Functions are:
| Function | Description |
|---|---|
| strlen() | The PHP strlen() function returns the length of a string. Syntax: echo strlen("Hello world!"); |
| str_word_count() | The PHP str_word_count() function counts the number of words in a string: Syntax: echo str_word_count("Hello world!"); |
| strrev() | Reverses a string Syntax: echo strrev("Hello world!"); |
| strpos() | Searches for a specific text within a string. If a match is found, the function returns the character position of the first match. If no match is found, it will return FALSE. Syntax: echo strpos("Hello world!", "world"); |
| str_replace() | Replaces some characters with some other characters in a string. Syntax: echo str_replace("world", "Dolly", "Hello world!"); |
| strchr() | Searches for the first occurrence of a string inside another string. Syntax: echo strchr("Hello world!","world"); |
| strcmp() | Compare two strings (case-sensitive): Syntax: echo strcmp("Hello world!","Hello world!"); |
| strcasecmp() | Compares two strings (case-insensitive) |
| strncmp() | String comparison of the first n characters (case-sensitive) |
| strtolower() | Converts a string to lowercase letters |
| strtoupper() | Converts a string to uppercase letters |
| str_shuffle() | Shuffles all characters in a string Randomly. |
| str_repeat() | Repeats a string upto specified number of times. |
| substr() | Returns a part of a string. |
| trim() | Removes whitespace or other characters from both sides of a string |
| ucfirst() | Converts the first character of a string to uppercase |
| ucwords() | Converts the first character of each word in a string to uppercase |
| wordwrap() | Wraps a string to a given number of characters |