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Divya
| Function Name | Description | 
|---|---|
| Function Name | Description | 
| rand() | Used to generates a random integer. | 
| mt_rand() | Used to generates a secure random integer. | 
| strcmp() | Used to compares two strings. | 
| trim() | Used to removes whitespace and other predefined characters from both sides of a string. | 
| substr() | Used to returns a part of a string. | 
| strlen() | Used to returns the length of a string. | 
| echo() | Used to returns the length of a stringoutputs one or more strings. | 
| isset() | Used to determine if a variable is set or not. | 
| count() | Used to count the number of elements in an array. | 
| mail() | Used to send emails. | 
| extract() | Used to imports variables into the local symbol table from an array. | 
| addcslashes() | Used to add backslashes in front of the specified characters. | 
| bin2hex() | Used to converts a string of ASCII characters to hexadecimal values. | 
| htmlentities() | htmlentities() function used to converts characters to HTML entities. | 
| strrev() | strrev() function used to get reverses of a string. | 
| strtoupper() | strtoupper() function is used to converts a string to uppercase. | 
| strtolower() | strtolower() function is used to converts a string to lowercase. | 
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