Common string processing functions in php

Common string processing functions in php only provide a few simple and commonly used functions. execute the chop command to remove spaces. get_html_translation_table returns the conversion list to the variable and defines the HTML-encoded string htmlentities, htmlspecialchars_decode defines strings containing special HTML characters, such as nl2br quotemeta rtrim.

Definition and usage: the chop () function deletes the white space or other pre-defined characters from the end of the string, the alias of the rtrim () function of the function.

Syntax: chop (string, charlist). The code is as follows:

$ Str = "I'm a teacher"; // define a string

$ Result = chop ($ str); // you can remove spaces.

Echo $ result; // output result

Definition and usage: the get_html_translation_table () function returns the translation table used by the htmlentities () and htmlspecialchars () functions.

Syntax: get_html_translation_table (function, quotestyle). The code is as follows:

/*/

$ Trans = get_html_translation_table (html_entities); // return the conversion list to the variable

Print_r ($ trans); // output conversion table

$ Str = "hallo & & Krmer "; // define a string

$ Encoded = strtr ($ str, $ trans); // search for characters

Echo $ encoded; // output result

//

$ Str = "a 'quote' isBold"; // Define a string that includes html encoding

Echo htmlentities ($ str); // output the processed string

Echo htmlentities ($ str, ent_quotes); // output result after an optional parameter is added

//

$ Str ='

This->"

'; // Define a string containing special html characters

Echo htmlspecialchars_decode ($ str); // output the converted content

Echo"
";

Echo htmlspecialchars_decode ($ str, ent_noquotes); // output results without the quotation marks being encoded

//

$ Str = "cat isn't n dog"; // defines a string containing a linefeed.

$ Result = nl2br ($ str); // perform the conversion operation.

Echo $ result; // output the converted result

//

$ Str = "hello world. (can you hear me ?) "; // Define a string containing metacharacters

$ Result = quotemeta ($ str); // execute the conversion operation

Echo $ result; // output the converted result

// Open source code phpfensi.com

//

$ Str = "hello world"; // defines a string with spaces at the end

$ Result = rtrim ($ str); // execute the conversion operation

Echo $ result; // output the converted result