PHP common examples of string manipulation functions summary (trim, nl2br, addcslashes, UUDecode, MD5, etc.)

/*commonly used string output function * * the echo () output String * print () outputs one or more strings * die () outputs a message and exits the current script * printf () output formatted string * sprintf () writes the formatted string to a variable *< /c1>*///Ucfirst//Converts the first letter in a string to uppercase$str= "string";Echo Ucfirst($str);Echo";//ucwords ()//capitalize the first letter of each word in a string$ucword= "Hello everyone!";Echo Ucwords($ucword);Echo";//LTrim () RTrim () trim ()//Remove Space$str= "123 This is a test ...";Echo LTrim($str, "0..9"). " <br/> ";//remove the numbers on the leftEcho RTrim($str,".")." <br/> ";Echo Trim($str, "0..9A.. Z. ")." <br/> ";//Remove the uppercase letters at both ends of the string and the numbers.//html related string formatting functions//nl2br ()//convert \ n in string to ' <br/> '$str= "This is \ n Hello World";Echo NL2BR($str).‘ <br/> ';//htmlspecialchars ()//display HTML tags as characters without explanation$str= "<b>hello world</b>";Echo $str." <br/> ";Echo Htmlspecialchars($str);Echo";//addcslashes//Adding backslashes$str=addcslashes("foo[]", "A." Z);Echo $str." <br/> ";Echo addcslashes("zoo[.") ", ' A. Z '). " <br/> ";//Convert_uuencode ()//encode a string using the UUDecode method$string= "Hello World";$str=Convert_uuencode($string);Echo $str." <br/> ";Echo Convert_uudecode($str)." <br/> ";//Html_entity_decode (String $string [, int $flags = Ent_compat | ent_html401 [, String $encoding = ' UTF-8 '])//In contrast to the Htmlentities method, converts the encoded HTML character into a form that the browser can compile$a= "I want a bright <b>future</b>";$b=htmlentities($a)." <br/> ";Echo $b;Echo Html_entity_decode($b);Echo";//Htmlspecialchars_decode (String $string [, int $flags = Ent_compat | ENT_HTML401]//In contrast to the Htmlspecialchars function, convert an HTML entity to a character$c=Htmlspecialchars($a);Echo $c." <br/> ";EchoHtmlspecialchars_decode ($c)." <br/> ";Echo";//Lcfirst (String $str)//lowercase The first character of a string$str= "Hello World";//Echo Lcfirst ($str). " <br/> ";//md5_file (string $filename [, bool $raw _output = false])//The file is MD5 encrypted//$string= "Password";$str=MD5($string);if($str= = "5f4dcc3b5aa765d61d8327deb882cf99"){ Echo"The password is right <br/>";}//parse_str (String $str [, Array & $arr])//parse a string into the form of a variable and an array$str= "First=value&arr[]=foo+bar&arr[]=baz";Parse_str($str,$input);Print_r($input);Echo";//string Sha1_file (string $filename [, bool $raw _output = false])//hash value of the computed fileforeach(Glob("c:/lamp/appache2/htdocs/*.php") as $ent){ if(Is_dir($ent)){ Continue; } Echo $ent." (SHA1: ".Sha1_file($ent).") <br/> ";}Echo";//int Similar_text (string $first, String $second [, float & $percent])//calculates the similarity of two strings, passing the third argument by reference, Similar_text () Calculates the percentage of similarity to//. $string 1= "Rogerzhalili";$string 2= "Zhangjieroger";if(Similar_text($string 1,$string 2,$percent)){ Echo $string 1. "and".$string 2. "Has the similarity of:".$percent." <br/> ";}Echo";//String str_shuffle (string $str)//disrupts a string$string= "I want solve this problem";Echo Str_shuffle($string)." <br/> ";//array Str_split (string $string [, int $split _length = 1])//split string by specified length$arr=Str_split($string, 3);//str_word_count (String $string [, int $format = 0 [, string $charlist]]//number of words in the statistics stringEcho";//int Strripos (string $haystack, string $needle [, int $offset = 0])//finds the location of the last occurrence of the specified string in the target string in a case-insensitive manner. Unlike Strrpos (), Strripos () is case insensitive. Offset is used to specify where to start the search$haystack= ' ABABCD ';$needle= ' Ab ';Echo"The Last".$needle." Postion is: ".Strripos($haystack,$needle)." <br/> ";Echo Strrpos($haystack, ' AB ');Echo";//string Strstr (String $haystack, mixed $needle [, bool $before _needle = false])//Returns the Haystack string from where the needle first appeared The string that starts at the end of haystack. The function is case-sensitive. If you want to be case-insensitive, use//STRISTR (). $a= "The First Test";$needle= "Fi";Echo strstr($a,$needle)." <br/> ";if($c=strstr($a, "Fio")){ Echo"Find".$c." <br/> ";}Else{ Echo"Not find the string!<br/>";}Echo";//int Substr_count (string $haystack, string $needle [, int $offset = 0 [, int $length]])//Find $needle substring out in $haystack Number of occurrences, $needle case-sensitive$hay= "La la wa la wa wa lala";Echo Substr_count($hay, "La"). " <br> ";//int Preg_match_all (string $pattern, String $subject [, Array & $matches [, int $flags = Preg_pattern_order [, in T $offset = 0]])//regular match to store the matched result in $matches (if $matches is specified)Preg_match_all("/? (\D3)?? (? (1) [\-\s]) \d{3}-\d{4}/x "," Call 555-1212 or 1-800-555-1212 ",$phones);Echo"<pre>";Print_r($phones);Echo"</pre>";Echo";//preg_replace (mixed $pattern, mixed $replacement, mixed$subject[, int$limit=-1 [, Int &$count ]] )//Searches for the part of the subject that matches the pattern, replacing it with replacement.$string= ' April 15, 2003 ';$pattern= '/(\w+) (\d+), (\d+)/I ';$replacement= ' ${1}1,$3 ';Echo Preg_replace($pattern,$replacement,$string);Echo";//array Preg_split (String $pattern, string $subject [, int $limit =-1 [, int $flags = 0])//The given string is separated by a regular expression. $str= ' String ';$chars=Preg_split(‘//‘,$str,-1,preg_split_no_empty);Print_r($chars);

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PHP common examples of string manipulation functions summary (trim, nl2br, addcslashes, UUDecode, MD5, etc.)