PHP Intercept String function strtr/str_replace

/**

* 1. Strtr converting a specified character

*

* String Strtr (String $str, String $from, String $to)

* String Strtr (string $str, array $replace _pairs)

*

* This function returns a copy of Str and converts the character specified in the From to the corresponding character in to.

* If the from and to lengths are not equal, the extra character parts will be ignored.

*/

$str = ' http://flyer0126.iteye.com/';

Echo strtr ($str, ' IT ', ' Java ');

OUTPUT:HTTP://FLYER0126.ITEYE.COM/STRTR Case Sensitive

If the from and to lengths are not equal, the extra character parts are ignored

Echo strtr ($str, ' It ', ' Java ');

output:haap://flyer0126.jaeye.com/

Iteye---Jaeye It's just for JA.

HTTP---HAAP word-by-character replacement of the corresponding position, which does not fit our purpose

Echo strtr ($str, ' it ', ');

output:http://flyer0126.iteye.com/No replacement

Echo strtr ($str, ' it ', ');

output:http://flyer0126. teye.com/can be replaced

/**

* The From->to way of function STRTR is summarized as follows:

* 1. Case sensitive;

* 2. When the form and to length are unequal, the extra characters will be ignored, can not be changed less, and can not be changed more;

* 3. Replace the corresponding position by character;

* 4. cannot be replaced with empty and can be replaced by spaces.

*/

In comparison, the latter approach is more appropriate

$replace _pairs = Array (

'/http '/' = ',

' It ' = ' java '

);

Echo Strtr ($str, $replace _pairs);

output:flyer0126.javaeye.com/replacement success, in line with the original replacement

/**

* 2. function Str_replace

* Mixed Str_replace (mixed $search, mixed $replace, mixed $subject [, int & $count])

*/

Echo str_replace (' It ', ' Java ', $str);

output:http://flyer0126.javaeye.com/

echo str_replace (Array (' http ', ': ', '//', '/'), ', $str);

Output:flyer0126.iteye.com

echo str_replace (Array (' HTTP ', ' it ', '/'), Array (' HTTPS ', ' Java ', '), $STR);

Output:https:flyer0126.javaeye.com

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