PHP, Structures and Functions, STRINGS

If $search and $replace are ARRAYS, this function takes a value from each ARRAY and uses them to search and replace on $subject.

If $replace has fewer values than $search, then an empty STRING is used for the rest of replacement values.

If $search is an ARRAY and $replace is a STRING, then this replacement STRING is used for every value of $search.

The opposite is meaningless, however.

If $search or $replace are ARRAYS, their elements are processed first to last.

If $subject is an ARRAY, then the search and replace is performed with every entry of $subject, and the return value is an ARRAY as well.

This function returns a STRING or an ARRAY with the replaced values.

This function is binary-safe

This functions replaces left to right, it might replace a previously inserted value when doing multiple replacements.


<?php

mix str_ireplace ( mix $search , 
                            mix $replace , 
                            mix $subject [, 
                            int &$count ] )


where,

$search = The needle or ARRAY of 
                           needles to be searched for

$replace = The replacement value or ARRAY 
                           of values that replaces found search values

$replace = The haystack, STRING or ARRAY 
                           being searched and replaced on

&$count = The number of performed replacements

?>

$search

The needle or ARRAY of needles to be searched for.

$replace

The replacement value or ARRAY of values that replaces found search values.

$suject

The haystack, STRING or ARRAY being searched and replaced on.

&$count

The number of performed replacements.

EXERCISE


<?php 

$str01 = "Everything what is said on something, 
           does not have to be necessarily a REPLY!";
           
$strsb01a = "TRUE!"; 
$strsb01b = "LIE!"; 

$rtvl01a = "Everything what is said on something, 
           does not have to be necessarily a TRUE!";
           
$rtvl01b = "Everything what is said on something, 
           does not have to be necessarily a LIE!";

$cnt01a = 72;
$cnt01b = -6;

echo $str01 . '<br><br>'; 
echo '$strsb01a = ' . $strsb01a . '<br>'; 
echo '$strsb01b = ' . $strsb01b . '<br><br>';

echo '$rtvl01a = ' . $rtvl01a . '<br>'; 
echo '$rtvl01b = ' . $rtvl01b . 
'<br><br>- - - - - - - - - - - -<br><br>'; 

echo "str_ireplace ($str01, $strsb01a, $rtvl01a, $cnt01a)<br><br>"; 
$vlr101a = str_ireplace ($str01, $strsb01a, $rtvl01a, $cnt01a); 
echo $vlr101a . 
'<br><br><br>- - - - - - - - - - - -<br><br>'; 

echo "str_ireplace ($str01, $strsb01b, $rtvl01b, $cnt01b)<br><br>"; 
$vlr101b = str_ireplace ($str01, $strsb01b, $rtvl01b, $cnt01b); 
echo $vlr101b . 
'<br><br>- - - - - - - - - - - -<br><br>'; 


?>

EXERCISE


<?php

$nedl02l = ['cao', 'me'];

$nedl02u = ['CAO', 'ME'];

$rpl02 = ['ção', 'mé'];

$sbj02 = 'Estruturacao Geometrica.';

$acstr02l = str_ireplace($nedl02l, $rpl02, $sbj02, $cnt02);

// To replace cao by ção and me by mé

// Estruturação Geométrica(PORTUGUESE) = 
// = Geometric Structuring(ENGLISH)
 
echo $acstr02l . ' (' . $cnt02 . ')<br><br>';

$acstr02u = str_ireplace($nedl02u, $rpl02, $sbj02, $cnt02);

echo $acstr02u . ' (' . $cnt02 . ')<br>';

?>

EXERCISE


<?php

$nedl03 = ['GEOMETRIC', 'structuring'];

$rpl03 = ['GEOMETRIC', 'STRUCTURING'];

$sbj03 = 'geometric structuring.'; 

$acstr03 = str_ireplace($nedl03, $rpl03, $sbj03, $ct03);
 
echo $acstr03 . ' ( ' . $ct03 . ' )';

?>

EXERCISE


<?php

$nedl04 = ['T', 'B', 'a', 'D', 'e'];

$rpl04 = ['A', 'X', 'D', 'f', 'E'];

$sbj04  = 'Better to ask the way than go astray.';

$acstr04 = str_ireplace($nedl04, $rpl04, $sbj04, $ct04);
 
echo $acstr04 . ' ( ' . $ct04 . ' )';

?>

EXERCISE


<?php

var_dump(str_ireplace("", "", ""));
echo '<br><br>';
var_dump(str_ireplace("tt", "a", "ttttTttttttttTT"));
echo '<br><br>';
var_dump(str_ireplace("tt", "a", "ttttTttttttttTT", $count));
var_dump($count);
echo '<br><br><br>';
var_dump(str_ireplace("tt", "aa", "ttttTttttttttTT"));
echo '<br><br>';
var_dump(str_ireplace("tt", "aa", "ttttTttttttttTT", $count));
var_dump($count);
echo '<br><br><br>';
var_dump(str_ireplace("tt", "aaa", "ttttTttttttttTT"));
echo '<br><br>';
var_dump(str_ireplace("tt", "aaa", "ttttTttttttttTT", $count));
var_dump($count);
echo '<br><br><br>';
var_dump(str_ireplace("tt", "aaa", "ttttTttttttttTT"));
echo '<br><br>';
var_dump(str_ireplace("tt", "aaa", "ttttTttttttttTT", $count));
var_dump($count);
echo '<br><br><br>';
var_dump(str_ireplace(array("tt", "tt"), "aaa", "ttttTttttttttTT"));
echo '<br><br><br>';
var_dump(str_ireplace(array("tt", "tt"), 
                array("aaa"), "ttttTttttttttTT"));
echo '<br><br>';
var_dump(str_ireplace(array("tt", "y"), 
              array("aaa", "bbb"), "ttttTttttttttTT"));
echo '<br><br><br>';
var_dump(str_ireplace(array("tt", "tt"), "aaa", "ttttTttttttttTT"));
echo '<br><br>';
var_dump(str_ireplace(array("tt", "tt"), 
                  array("aaa"), "ttttTttttttttTT"));
echo '<br><br>';
var_dump(str_ireplace(array("tt", "y"), 
           array("aaa", "bbb"), "ttttTttttttttTT"));
echo '<br><br><br>';
var_dump(str_ireplace(array("tt", "y"), 
           array("aaa", "bbb"), 
           array("ttttTttttttttTT", "aayyaayasdayYahsdYYY")));
echo '<br><br>';
var_dump(str_ireplace(array("tt", "y"), 
                         array("aaa", "bbb"), 
                         array("key"=>"ttttTttttttttTT", 
                         "test"=>"aayyaayasdayYahsdYYY")));
echo '<br><br>';
var_dump(str_ireplace(array("t"=>"tt", "y"=>"y"), 
             array("a"=>"aaa", "b"=>"bbb"), 
             array("key"=>"ttttTttttttttTT", 
             "test"=>"aayyaayasdayYahsdYYY")));

/* separate testcase for str_ireplace() off-by-one */
echo '<br><br><br><br>';
$Data = "Change tracking and management 
    software designed to watch for abnormal 
    system behavior.\nSuggest features, report bugs, 
    or ask questions here.";
var_dump($Data = str_ireplace("\r\n", "<br>", $Data));
echo '<br><br>';
var_dump($Data = str_ireplace("\n", "<br>", $Data));

?>