What is use of preg_replace in php?
(PHP 4, PHP 5, PHP 7, PHP 8) Show preg_replace — Perform a regular expression search and replace Descriptionpreg_replace( Parameterspattern The pattern to search for. It can be either a string or an array with strings. Several PCRE modifiers are also available. replacement The string or an array with strings to replace. If this parameter is a string and the When working with a replacement pattern where a backreference is immediately followed by another number (i.e.: placing a literal number immediately after a matched pattern), you cannot use the familiar When using the deprecated subject The string or an array with strings to search and replace. If If the limit The maximum possible replacements for each pattern in each count If specified, this variable will be filled with the number of replacements done. Return Values preg_replace() returns an array if the If matches are found, the new Errors/Exceptions Using the "\e" modifier is an error; an If the regex
pattern passed does not compile to a valid regex, an ExamplesExample #1 Using backreferences followed by numeric literals
The above example will output: Example #2 Using indexed arrays with preg_replace()
The above example will output: The bear black slow jumps over the lazy dog. By ksorting patterns and replacements, we should get what we wanted.
The above example will output: The slow black bear jumps over the lazy dog. Example #3 Replacing several values
The above example will output: Example #4 Strip whitespace This example strips excess whitespace from a string.
Example #5 Using the
preg_replace(array('/\d/', '/\s/'), '*', 'xp 4 to', -1 , $count); The above example will output: Notes
See Also
arkani at iol dot pt ¶ 13 years ago
bublifuk at mailinator dot com ¶ 4 years ago
me at perochak dot com ¶ 11 years ago
sternkinder at gmail dot com ¶ 15 years ago
switch_chars("AGTCTGCCCTAG", array("A"=>"T","G"=>"C")); //output will be TCAGACGGGATC
nik at rolls dot cc ¶ 9 years ago
php-comments-REMOVE dot ME at dotancohen dot com ¶ 14 years ago
="עברית מבולגנת"; ismith at nojunk dot motorola dot com ¶ 15 years ago
mail at johanvandemerwe dot nl ¶ 2 years ago
preg_replace($patterns, $replacements, $html); What is the difference between Str_replace and Preg_replace?str_replace replaces a specific occurrence of a string, for instance "foo" will only match and replace that: "foo". preg_replace will do regular expression matching, for instance "/f. {2}/" will match and replace "foo", but also "fey", "fir", "fox", "f12", etc.
What is Preg_match_all in PHP?PHP preg_match_all() Function
The preg_match_all() function returns the number of matches of a pattern that were found in a string and populates a variable with the matches that were found.
Which function is used to replacing pattern in string?replace() The replace() method returns a new string with one, some, or all matches of a pattern replaced by a replacement . The pattern can be a string or a RegExp , and the replacement can be a string or a function called for each match.
What is regular expression in PHP?In PHP, regular expressions are strings composed of delimiters, a pattern and optional modifiers. $exp = "/w3schools/i"; In the example above, / is the delimiter, w3schools is the pattern that is being searched for, and i is a modifier that makes the search case-insensitive.
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