addcslashes - Quote string with slashes in a C style
addslashes - Quote string with slashes
bin2hex - Convert binary data into hexadecimal representation
chop - Alias of rtrim
chr - Generate a single-byte string from a number
chunk_split - Split a string into smaller chunks
convert_cyr_string - Convert from one Cyrillic character set to another
convert_uudecode - Decode a uuencoded string
convert_uuencode - Uuencode a string
count_chars - Return information about characters used in a string
crc32 - Calculates the crc32 polynomial of a string
crypt - One-way string hashing
echo - Output one or more strings
explode - Split a string by a string
fprintf - Write a formatted string to a stream
get_html_translation_table - Returns the translation table used by htmlspecialchars and htmlentities
hebrev - Convert logical Hebrew text to visual text
hebrevc - Convert logical Hebrew text to visual text with newline conversion
hex2bin - Decodes a hexadecimally encoded binary string
html_entity_decode - Convert HTML entities to their corresponding characters
htmlentities - Convert all applicable characters to HTML entities
htmlspecialchars_decode - Convert special HTML entities back to characters
htmlspecialchars - Convert special characters to HTML entities
implode - Join array elements with a string
join - Alias of implode
lcfirst - Make a string's first character lowercase
levenshtein - Calculate Levenshtein distance between two strings
localeconv - Get numeric formatting information
ltrim - Strip whitespace (or other characters) from the beginning of a string
md5_file - Calculates the md5 hash of a given file
md5 - Calculate the md5 hash of a string
metaphone - Calculate the metaphone key of a string
money_format - Formats a number as a currency string
nl_langinfo - Query language and locale information
nl2br - Inserts HTML line breaks before all newlines in a string
number_format - Format a number with grouped thousands
ord - Convert the first byte of a string to a value between 0 and 255
parse_str - Parses the string into variables
print - Output a string
printf - Output a formatted string
quoted_printable_decode - Convert a quoted-printable string to an 8 bit string
quoted_printable_encode - Convert a 8 bit string to a quoted-printable string
quotemeta - Quote meta characters
rtrim - Strip whitespace (or other characters) from the end of a string
setlocale - Set locale information
sha1_file - Calculate the sha1 hash of a file
sha1 - Calculate the sha1 hash of a string
similar_text - Calculate the similarity between two strings
soundex - Calculate the soundex key of a string
sprintf - Return a formatted string
sscanf - Parses input from a string according to a format
str_getcsv - Parse a CSV string into an array
str_ireplace - Case-insensitive version of str_replace
str_pad - Pad a string to a certain length with another string
str_repeat - Repeat a string
str_replace - Replace all occurrences of the search string with the replacement string
str_rot13 - Perform the rot13 transform on a string
str_shuffle - Randomly shuffles a string
str_split - Convert a string to an array
str_word_count - Return information about words used in a string
strcasecmp - Binary safe case-insensitive string comparison
strchr - Alias of strstr
strcmp - Binary safe string comparison
strcoll - Locale based string comparison
strcspn - Find length of initial segment not matching mask
strip_tags - Strip HTML and PHP tags from a string
stripcslashes - Un-quote string quoted with addcslashes
stripos - Find the position of the first occurrence of a case-insensitive substring in a string
stripslashes - Un-quotes a quoted string
stristr - Case-insensitive strstr
strlen - Get string length
strnatcasecmp - Case insensitive string comparisons using a "natural order" algorithm
strnatcmp - String comparisons using a "natural order" algorithm
strncasecmp - Binary safe case-insensitive string comparison of the first n characters
strncmp - Binary safe string comparison of the first n characters
strpbrk - Search a string for any of a set of characters
strpos - Find the position of the first occurrence of a substring in a string
strrchr - Find the last occurrence of a character in a string
strrev - Reverse a string
strripos - Find the position of the last occurrence of a case-insensitive substring in a string
strrpos - Find the position of the last occurrence of a substring in a string
strspn - Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask
strstr - Find the first occurrence of a string
strtok - Tokenize string
strtolower - Make a string lowercase
strtoupper - Make a string uppercase
strtr - Translate characters or replace substrings
substr_compare - Binary safe comparison of two strings from an offset, up to length characters
substr_count - Count the number of substring occurrences
substr_replace - Replace text within a portion of a string
substr - Return part of a string
trim - Strip whitespace (or other characters) from the beginning and end of a string
ucfirst - Make a string's first character uppercase
ucwords - Uppercase the first character of each word in a string
vfprintf - Write a formatted string to a stream
vprintf - Output a formatted string
vsprintf - Return a formatted string
wordwrap - Wraps a string to a given number of characters