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str_replace

str_replace

Replace all occurrences of the search string with the replacement string

 **str_replace**  $search  $replace  $subject int $count

This function returns a string or an array with all occurrences of in replaced with the given value. search``subject``replace

To replace text based on a pattern rather than a fixed string, use . preg_replace

If and are arrays, then takes a value from each array and uses them to search and replace on . If has fewer values than , then an empty string is used for the rest of replacement values. If is an array and is a string, then this replacement string is used for every value of . The converse would not make sense, though. search``replace``str_replace``subject``replace``search``search``replace``search

If or are arrays, their elements are processed first to last. search``replace

search The value being searched for, otherwise known as the . An array may be used to designate multiple needles. needle

replace The replacement value that replaces found values. An array may be used to designate multiple replacements. search

subject The string or array being searched and replaced on, otherwise known as the . haystack

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

countIf passed, this will be set to the number of replacements performed.

This function returns a string or an array with the replaced values.

Voorbeeld: Basic examples

<?php
// Provides: <body text='black'>
$bodytag = str_replace("%body%", "black", "<body text='%body%'>");
echo $bodytag, PHP_EOL;

// Provides: Hll Wrld f PHP
$vowels = array("a", "e", "i", "o", "u", "A", "E", "I", "O", "U");
$onlyconsonants = str_replace($vowels, "", "Hello World of PHP");
echo $onlyconsonants, PHP_EOL;

// Provides: You should eat pizza, beer, and ice cream every day
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array("fruits", "vegetables", "fiber");
$yummy   = array("pizza", "beer", "ice cream");

$newphrase = str_replace($healthy, $yummy, $phrase);
echo $newphrase, PHP_EOL;

// Provides: 2
$str = str_replace("ll", "", "good golly miss molly!", $count);
echo $count, PHP_EOL;
?>

Voorbeeld: Examples of potential gotchas

<?php
// Order of replacement
$str     = "Line 1\nLine 2\rLine 3\r\nLine 4\n";
$order   = array("\r\n", "\n", "\r");
$replace = '<br />';

// Processes \r\n's first so they aren't converted twice.
$newstr = str_replace($order, $replace, $str);
echo $newstr, PHP_EOL;

// Outputs F because A is replaced with B, then B is replaced with C, and so on...
// Finally E is replaced with F, because of left to right replacements.
$search  = array('A', 'B', 'C', 'D', 'E');
$replace = array('B', 'C', 'D', 'E', 'F');
$subject = 'A';
echo str_replace($search, $replace, $subject), PHP_EOL;

// Outputs: apearpearle pear
// For the same reason mentioned above
$letters = array('a', 'p');
$fruit   = array('apple', 'pear');
$text    = 'a p';
$output  = str_replace($letters, $fruit, $text);
echo $output, PHP_EOL;
?>

Let op: > ### Replacement order gotcha

Because  replaces left to right, it might
replace a previously inserted value when doing multiple replacements.
See also the examples in this document.

str_replace

Opmerking: > This function is case-sensitive. Use for case-insensitive replace. str_ireplace

str_ireplace``substr_replace``preg_replace``strtr

Vorige ← str_repeat Volgende str_rot13 →

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