DAY 9
PHP String Manipulating Functions
The PHP string functions are part of
the PHP core. No installation is required to use these functions.
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Function
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Description
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Returns a string with backslashes in front of
the specified characters
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Returns a string with backslashes in front of
predefined characters
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Converts a string of ASCII characters to
hexadecimal values
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Removes whitespace or other characters from the
right end of a string
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Returns a character from a specified ASCII
value
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Splits a string into a series of smaller parts
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Converts a string from one Cyrillic
character-set to another
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Decodes a uuencoded string
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Encodes a string using the uuencode algorithm
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Returns information about characters used in a
string
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Calculates a 32-bit CRC for a string
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One-way string hashing
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Outputs one or more strings
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Breaks a string into an array
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Writes a formatted string to a specified output
stream
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Returns the translation table used by
htmlspecialchars() and htmlentities()
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Converts Hebrew text to visual text
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Converts Hebrew text to visual text and new
lines (\n) into <br>
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Converts a string of hexadecimal values to
ASCII characters
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Converts HTML entities to characters
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Converts characters to HTML entities
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Converts some predefined HTML entities to
characters
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Converts some predefined characters to HTML
entities
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Returns a string from the elements of an array
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Alias of implode()
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Converts the first character of a string to
lowercase
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Returns the Levenshtein distance between two
strings
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Returns locale numeric and monetary formatting
information
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Removes whitespace or other characters from the
left side of a string
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Calculates the MD5 hash of a string
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Calculates the MD5 hash of a file
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Calculates the metaphone key of a string
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Returns a string formatted as a currency string
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Returns specific local information
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Inserts HTML line breaks in front of each
newline in a string
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Formats a number with grouped thousands
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Returns the ASCII value of the first character
of a string
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Parses a query string into variables
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Outputs one or more strings
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Outputs a formatted string
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Converts a quoted-printable string to an 8-bit
string
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Converts an 8-bit string to a quoted printable
string
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Quotes meta characters
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Removes whitespace or other characters from the
right side of a string
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Sets locale information
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Calculates the SHA-1 hash of a string
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Calculates the SHA-1 hash of a file
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Calculates the similarity between two strings
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Calculates the soundex key of a string
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Writes a formatted string to a variable
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Parses input from a string according to a
format
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Parses a CSV string into an array
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Replaces some characters in a string
(case-insensitive)
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Pads a string to a new length
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Repeats a string a specified number of times
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Replaces some characters in a string
(case-sensitive)
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Performs the ROT13 encoding on a string
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Randomly shuffles all characters in a string
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Splits a string into an array
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Count the number of words in a string
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Compares two strings (case-insensitive)
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Finds the first occurrence of a string inside
another string (alias of strstr())
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Compares two strings (case-sensitive)
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Compares two strings (locale based string
comparison)
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Returns the number of characters found in a
string before any part of some specified characters are found
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Strips HTML and PHP tags from a string
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Unquotes a string quoted with addcslashes()
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Unquotes a string quoted with addslashes()
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Returns the position of the first occurrence of
a string inside another string (case-insensitive)
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Finds the first occurrence of a string inside
another string (case-insensitive)
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Returns the length of a string
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Compares two strings using a "natural
order" algorithm (case-insensitive)
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Compares two strings using a "natural
order" algorithm (case-sensitive)
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String comparison of the first n characters
(case-insensitive)
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String comparison of the first n characters
(case-sensitive)
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Searches a string for any of a set of
characters
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Returns the position of the first occurrence of
a string inside another string (case-sensitive)
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Finds the last occurrence of a string inside
another string
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Reverses a string
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Finds the position of the last occurrence of a
string inside another string (case-insensitive)
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Finds the position of the last occurrence of a
string inside another string (case-sensitive)
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Returns the number of characters found in a
string that contains only characters from a specified charlist
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Finds the first occurrence of a string inside
another string (case-sensitive)
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Splits a string into smaller strings
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Converts a string to lowercase letters
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Converts a string to uppercase letters
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Translates certain characters in a string
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Returns a part of a string
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Compares two strings from a specified start
position (binary safe and optionally case-sensitive)
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Counts the number of times a substring occurs
in a string
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Replaces a part of a string with another string
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Removes whitespace or other characters from both
sides of a string
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Converts the first character of a string to
uppercase
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Converts the first character of each word in a
string to uppercase
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Writes a formatted string to a specified output
stream
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Outputs a formatted string
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Writes a formatted string to a variable
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Wraps a string to a given number of characters
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