PHP Zip File Functions

• zip_close — Close a ZIP file archive
• zip_entry_close — Close a directory entry
• zip_entry_compressedsize — Retrieve the compressed size of a directory entry
• zip_entry_compressionmethod — Retrieve the compression method of a directory entry
• zip_entry_filesize — Retrieve the actual file size of a directory entry
• zip_entry_name — Retrieve the name of a directory entry
• zip_entry_open — Open a directory entry for reading
• zip_entry_read — Read from an open directory entry
• zip_open — Open a ZIP file archive
• zip_read — Read next entry in a ZIP file archive

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PHP MySQL Functions

• mysql_field_len — Returns the length of the specified field
• mysql_field_name — Get the name of the specified field in a result
• mysql_field_seek — Set result pointer to a specified field offset
• mysql_field_table — Get name of the table the specified field is in
• mysql_field_type — Get the type of the specified field in a result
• mysql_free_result — Free result memory
• mysql_get_client_info — Get MySQL client info
• mysql_get_host_info — Get MySQL host info
• mysql_get_proto_info — Get MySQL protocol info
• mysql_get_server_info — Get MySQL server info
• mysql_info — Get information about the most recent query
• mysql_insert_id — Get the ID generated in the last query
• mysql_list_dbs — List databases available on a MySQL server
• mysql_list_fields — List MySQL table fields
• mysql_list_processes — List MySQL processes
• mysql_list_tables — List tables in a MySQL database
• mysql_num_fields — Get number of fields in result
• mysql_num_rows — Get number of rows in result
• mysql_pconnect — Open a persistent connection to a MySQL server
• mysql_ping — Ping a server connection or reconnect if there is no connection
• mysql_query — Send a MySQL query
• mysql_real_escape_string — Escapes special characters in a string for use in an SQL statement
• mysql_result — Get result data
• mysql_select_db — Select a MySQL database
• mysql_set_charset — Sets the client character set
• mysql_stat — Get current system status
• mysql_tablename — Get table name of field
• mysql_thread_id — Return the current thread ID
• mysql_unbuffered_query — Send an SQL query to MySQL without fetching and buffering the result rows.
• mysql_affected_rows — Get number of affected rows in previous MySQL operation
• mysql_client_encoding — Returns the name of the character set
• mysql_close — Close MySQL connection
• mysql_connect — Open a connection to a MySQL Server
• mysql_create_db — Create a MySQL database
• mysql_data_seek — Move internal result pointer
• mysql_db_name — Retrieves database name from the call to mysql_list_dbs
• mysql_db_query — Selects a database and executes a query on it
• mysql_drop_db — Drop (delete) a MySQL database
• mysql_errno — Returns the numerical value of the error message from previous MySQL operation
• mysql_error — Returns the text of the error message from previous MySQL operation
• mysql_escape_string — Escapes a string for use in a mysql_query
• mysql_fetch_array — Fetch a result row as an associative array, a numeric array, or both
• mysql_fetch_assoc — Fetch a result row as an associative array
• mysql_fetch_field — Get column information from a result and return as an object
• mysql_fetch_lengths — Get the length of each output in a result
• mysql_fetch_object — Fetch a result row as an object
• mysql_fetch_row — Get a result row as an enumerated array
• mysql_field_flags — Get the flags associated with the specified field in a result

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PHP Date / Time Functions

• checkdate — Validate a Gregorian date
• date_add — Alias of DateTime::add
• date_create_from_format — Alias of DateTime::createFromFormat
• date_create — Alias of DateTime::__construct
• date_date_set — Alias of DateTime::setDate
• date_default_timezone_get — Gets the default timezone used by all date/time functions in a script
• date_default_timezone_set — Sets the default timezone used by all date/time functions in a script
• date_diff — Alias of DateTime::diff
• date_format — Alias of DateTime::format
• date_get_last_errors — Alias of DateTime::getLastErrors
• date_interval_create_from_date_string — Alias of DateInterval::createFromDateString
• date_interval_format — Alias of DateInterval::format
• date_isodate_set — Alias of DateTime::setISODate
• date_modify — Alias of DateTime::modify
• date_offset_get — Alias of DateTime::getOffset
• date_parse_from_format — Get info about given date formatted according to the specified format
• date_parse — Returns associative array with detailed info about given date
• date_sub — Alias of DateTime::sub
• date_sun_info — Returns an array with information about sunset/sunrise and twilight begin/end
• date_sunrise — Returns time of sunrise for a given day and location
• date_sunset — Returns time of sunset for a given day and location
• date_time_set — Alias of DateTime::setTime
• date_timestamp_get — Alias of DateTime::getTimestamp
• date_timestamp_set — Alias of DateTime::setTimestamp
• date_timezone_get — Alias of DateTime::getTimezone
• date_timezone_set — Alias of DateTime::setTimezone
• date — Format a local time/date
• getdate — Get date/time information
• gettimeofday — Get current time
• gmdate — Format a GMT/UTC date/time
• gmmktime — Get Unix timestamp for a GMT date
• gmstrftime — Format a GMT/UTC time/date according to locale settings
• idate — Format a local time/date as integer
• localtime — Get the local time
• microtime — Return current Unix timestamp with microseconds
• mktime — Get Unix timestamp for a date
• strftime — Format a local time/date according to locale settings
• strptime — Parse a time/date generated with strftime
• strtotime — Parse about any English textual datetime description into a Unix timestamp
• time — Return current Unix timestamp
• timezone_abbreviations_list — Alias of DateTimeZone::listAbbreviations
• timezone_identifiers_list — Alias of DateTimeZone::listIdentifiers
• timezone_location_get — Alias of DateTimeZone::getLocation
• timezone_name_from_abbr — Returns the timezone name from abbreviation
• timezone_name_get — Alias of DateTimeZone::getName
• timezone_offset_get — Alias of DateTimeZone::getOffset
• timezone_open — Alias of DateTimeZone::__construct
• timezone_transitions_get — Alias of DateTimeZone::getTransitions
• timezone_version_get — Gets the version of the timezonedb

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PHP HTTP Functions

• ob_deflatehandler — Deflate output handler
• ob_etaghandler — ETag output handler
• ob_inflatehandler — Inflate output handler
• http_parse_cookie — Parse HTTP cookie
• http_parse_headers — Parse HTTP headers
• http_parse_message — Parse HTTP messages
• http_parse_params — Parse parameter list
• http_persistent_handles_clean — Clean up persistent handles
• http_persistent_handles_count — Stat persistent handles
• http_persistent_handles_ident — Get/set ident of persistent handles
• http_get — Perform GET request
• http_head — Perform HEAD request
• http_post_data — Perform POST request with pre-encoded data
• http_post_fields — Perform POST request with data to be encoded
• http_put_data — Perform PUT request with data
• http_put_file — Perform PUT request with file
• http_put_stream — Perform PUT request with stream
• http_request_body_encode — Encode request body
• http_request_method_exists — Check whether request method exists
• http_request_method_name — Get request method name
• http_request_method_register — Register request method
• http_request_method_unregister — Unregister request method
• http_request — Perform custom request
• http_redirect — Issue HTTP redirect
• http_send_content_disposition — Send Content-Disposition
• http_send_content_type — Send Content-Type
• http_send_data — Send arbitrary data
• http_send_file — Send file
• http_send_last_modified — Send Last-Modified
• http_send_status — Send HTTP response status
• http_send_stream — Send stream
• http_throttle — HTTP throttling
• http_build_str — Build query string
• http_build_url — Build a URL
• http_cache_etag — Caching by ETag
• http_cache_last_modified — Caching by last modification
• http_chunked_decode — Decode chunked-encoded data
• http_deflate — Deflate data
• http_inflate — Inflate data
• http_build_cookie — Build cookie string
• http_date — Compose HTTP RFC compliant date
• http_get_request_body_stream — Get request body as stream
• http_get_request_body — Get request body as string
• http_get_request_headers — Get request headers as array
• http_match_etag — Match ETag
• http_match_modified — Match last modification
• http_match_request_header — Match any header
• http_support — Check built-in HTTP support
• http_negotiate_charset — Negotiate client's preferred character set
• http_negotiate_content_type — Negotiate client's preferred content type
• http_negotiate_language — Negotiate client's preferred language

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PHP Array Functions

• array_change_key_case — Changes all keys in an array
• array_chunk — Split an array into chunks
• array_combine — Creates an array by using one array for keys and another for its values
• array_count_values — Counts all the values of an array
• array_diff_assoc — Computes the difference of arrays with additional index check
• array_diff_key — Computes the difference of arrays using keys for comparison
• array_diff_uassoc — Computes the difference of arrays with additional index check which is performed by a user supplied callback function
• array_diff_ukey — Computes the difference of arrays using a callback function on the keys for comparison
• array_diff — Computes the difference of arrays
• array_fill_keys — Fill an array with values, specifying keys
• array_fill — Fill an array with values
• array_filter — Filters elements of an array using a callback function
• array_flip — Exchanges all keys with their associated values in an array
• array_intersect_assoc — Computes the intersection of arrays with additional index check
• array_intersect_key — Computes the intersection of arrays using keys for comparison
• array_intersect_uassoc — Computes the intersection of arrays with additional index check, compares indexes by a callback function
• array_intersect_ukey — Computes the intersection of arrays using a callback function on the keys for comparison
• array_intersect — Computes the intersection of arrays
• array_key_exists — Checks if the given key or index exists in the array
• array_keys — Return all the keys or a subset of the keys of an array
• array_map — Applies the callback to the elements of the given arrays
• array_merge_recursive — Merge two or more arrays recursively
• array_merge — Merge one or more arrays
• array_multisort — Sort multiple or multi-dimensional arrays
• array_pad — Pad array to the specified length with a value
• array_pop — Pop the element off the end of array
• array_product — Calculate the product of values in an array
• array_push — Push one or more elements onto the end of array
• array_rand — Pick one or more random entries out of an array
• array_reduce — Iteratively reduce the array to a single value using a callback function
• array_replace_recursive — Replaces elements from passed arrays into the first array recursively
• array_replace — Replaces elements from passed arrays into the first array
• array_reverse — Return an array with elements in reverse order
• array_search — Searches the array for a given value and returns the corresponding key if successful
• array_shift — Shift an element off the beginning of array
• array_slice — Extract a slice of the array
• array_splice — Remove a portion of the array and replace it with something else
• array_sum — Calculate the sum of values in an array
• array_udiff_assoc — Computes the difference of arrays with additional index check, compares data by a callback function
• array_udiff_uassoc — Computes the difference of arrays with additional index check, compares data and indexes by a callback function
• array_udiff — Computes the difference of arrays by using a callback function for data comparison
• array_uintersect_assoc — Computes the intersection of arrays with additional index check, compares data by a callback function
• array_uintersect_uassoc — Computes the intersection of arrays with additional index check, compares data and indexes by a callback functions
• array_uintersect — Computes the intersection of arrays, compares data by a callback function
• array_unique — Removes duplicate values from an array
• array_unshift — Prepend one or more elements to the beginning of an array
• array_values — Return all the values of an array
• array_walk_recursive — Apply a user function recursively to every member of an array
• array_walk — Apply a user function to every member of an array
• array — Create an array
• arsort — Sort an array in reverse order and maintain index association
• asort — Sort an array and maintain index association
• compact — Create array containing variables and their values
• count — Count all elements in an array, or something in an object
• current — Return the current element in an array
• each — Return the current key and value pair from an array and advance the array cursor
• end — Set the internal pointer of an array to its last element
• extract — Import variables into the current symbol table from an array
• in_array — Checks if a value exists in an array
• key — Fetch a key from an array
• krsort — Sort an array by key in reverse order
• ksort — Sort an array by key
• list — Assign variables as if they were an array
• natcasesort — Sort an array using a case insensitive "natural order" algorithm
• natsort — Sort an array using a "natural order" algorithm
• next — Advance the internal array pointer of an array
• pos — Alias of current
• prev — Rewind the internal array pointer
• range — Create an array containing a range of elements
• reset — Set the internal pointer of an array to its first element
• rsort — Sort an array in reverse order
• shuffle — Shuffle an array
• sizeof — Alias of count
• sort — Sort an array
• uasort — Sort an array with a user-defined comparison function and maintain index association
• uksort — Sort an array by keys using a user-defined comparison function
• usort — Sort an array by values using a user-defined comparison function

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Substrings PHP

If you know where in a larger string the interesting data lies, you can copy it out with

the substr( ) function:

$piece = substr(string, start [, length ]);

The start argument is the position in string at which to begin copying, with 0
meaning the start of the string. The length argument is the number of characters to
copy (the default is to copy until the end of the string).
For example:

$name = "Fred Flintstone";
$fluff = substr($name, 6, 4); // $fluff is "lint"
$sound = substr($name, 11); // $sound is "tone"
To learn how many times a smaller string occurs in a larger one, use substr_count( ):
$number = substr_count(big_string, small_string);

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