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XCIX. String functions
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These functions all manipulate strings in various ways. Some more specialized sections can be found in the regular expression and URL handling sections.
For information on how strings behave, especially with regard to usage of single quotes, double quotes, and escape sequences, see the Strings entry in the Types section of the manual.
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For even more powerful string handling and manipulating functions take a look at the POSIX regular expression functions and the Perl compatible regular expression functions.
Ŀ¼ 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 -- Return a specific character chunk_split -- Split a string into smaller chunks convert_cyr_string -- Convert from one Cyrillic character set to another count_chars -- Return information about characters used in a string crc32 -- Calculates the crc32 polynomial of a string crypt -- One-way string encryption (hashing) echo -- Output one or more strings explode -- Split a string by string 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 html_entity_decode -- Convert all HTML entities to their applicable characters htmlentities -- Convert all applicable characters to HTML entities htmlspecialchars -- Convert special characters to HTML entities implode -- Join array elements with a string join -- Join array elements with a string levenshtein -- Calculate Levenshtein distance between two strings localeconv -- Get numeric formatting information ltrim -- Strip whitespace from the beginning of a string md5_file -- Calculates the md5 hash of a given filename 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 -- Return ASCII value of character 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 quotemeta -- Quote meta characters rtrim -- Strip whitespace 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_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_word_count -- Return information about words used in a string strcasecmp -- Binary safe case-insensitive string comparison strchr -- Find the first occurrence of a character 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() stripslashes -- Un-quote string quoted with addslashes() 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 strpos -- Find position of first occurrence of a string strrchr -- Find the last occurrence of a character in a string strrev -- Reverse a string strrpos -- Find position of last occurrence of a char in a string strspn -- Find length of initial segment matching mask strstr -- Find first occurrence of a string strtok -- Tokenize string strtolower -- Make a string lowercase strtoupper -- Make a string uppercase strtr -- Translate certain 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 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 vprintf -- Output a formatted string vsprintf -- Return a formatted string wordwrap -- Wraps a string to a given number of characters using a string break character.
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stream_set_write_buffer
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addcslashes