String manipulation-Various string format output conversions

Some of the commonly used string manipulation features in projects include: intercept string lengths, output conversions, random strings, full-width half-width conversions, character set conversions, mailbox format validation, and digital to file size.

Various string format output conversion Code Snippets:

/** * Output Conversion * @param unknown $string * @param string $esc _type * @param string $char _set * @return String|mixed|unknown */p Ublic static function Fescape ($string, $esc _type= ' html ', $char _set= ' iso-8859-1 ') {switch ($esc _type) {case ' HTML ':// Special characters converted to HTML entity return Htmlspecialchars ($string, ent_quotes, $char _set); case ' Htmlall ': Return htmlentities ($string, ENT _quotes, $char _set); case ' URL ': Return Rawurlencode ($string); case ' Urlpathinfo ': Return str_replace ('%2f ', '/', Rawurlencode ($string)); case ' quotes '://Escape single quote return preg_replace ("% (? <!\\\\) '%", "\ \" ", $string); case ' hex ':// Converts binary data to hexadecimal notation $return= '; for ($x =0; $x <strlen ($string); $x + +) {$return. = '% '. Bin2Hex ($string [$x]);} return $return; case ' hexentity ': $return = "; for ($x =0; $x <strlen ($string); $x + +) {$return. = ' & #x '. Bin2Hex ($ string[$x]). '; ';} return $return; case ' decentity ': $return = "; for ($x =0; $x <strlen ($string); $x + +) {$return. = '". Ord "$string [$x ]).';';} return $return; case ' JavaScript '://Escape quotes and backslashes, line breaks, and so on. Return Strtr ($string, array (' \ \ ' = ' \\\\ ', "' = ' = ' \ ' ', ' ' ' ' ' \ \ ' \ ', ' \ r ' = ' \\r ', ' \ n ' = ' \\n ', ' </' = ' <\/'); case ' mail ':// Secure way to display the e-mail address on the webpage return str_replace (Array (' @ ', '. '), Array (' [at] ', ' [DOT] '), $string); case ' NONSTD '://escape non-standard characters, such as document reference $_res= '; for ($_i=0,$_len=strlen ($string); $_i<$_len;$_i++) {$_ord=ord (substr ($string, $_i,1));//Non-standard Char, Escape itif ($_ord>=126) {$_res.= '. $_ord. '; ';} Else{$_res.=substr ($string, $_i,1);}} return $_res;default:return $string;}}

Main code features:
Various string format output conversions.
The main functions apply:
Htmlspecialchars: Takes a paragraph out of the array, and defaults to reordering and resetting the array's numeric index.
Htmlentities: For more information, see: PHP uses regular expressions to find replacement strings http://blog.csdn.net/websites/article/details/18734583
Rawurlencode: Returns a string in which all non-alphanumeric characters except-_ are replaced with a percent (%) followed by a two-digit hexadecimal number. URLs are encoded according to RFC 1738, in order to protect the literal characters from being interpreted as a special URL delimiter, while protecting the URL format from being confused by the transfer media (like some messaging systems) using character conversions.
Bin2Hex: Converts binary data to hexadecimal representation
STRTR: Converts the specified character

Ord: Returns the ASCII value of the character, which is a complementary function of Chr ().

preg_replace: For details, please refer to: PHP uses regular expressions to find replacement strings

HTML AutoComplete (for more information: HTML tag completion for Web content and Filtering methods )

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String manipulation-Various string format output conversions