php string replacement function_PHP tutorial

This article introduces two character replacement functions for PHP beginners, one is str_ireplace() and the other is substr_replace(). These two functions are relatively easy to use. Please refer to them if necessary.

String replacement technology can be implemented through the following two commonly used functions: str_ireplace() function and substr_replace() function
str_ireplace() function
Use a new substring to replace the string specified to be replaced in the original string, syntax:
mixed str_ireplace(mixed search,mixed replace,mixed subject[,int&count])
Parameter search: necessary parameter, specify the string to be searched.
Parameter replace: necessary parameter, specify the replacement value.
Parameter subject: necessary parameter, specifying the search range.
Parameter count: optional parameter, (the ones with square brackets are optional parameters), get the number of substitutions to be performed.

Example:

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代码如下	复制代码
$str2=”某某”; $str1=”**”; $str=”某某网站的地址是www.hzhuti.com ，某某网站主要记录一些学习php的笔记和感想以及各种软件知识”; echo str_ireplace($str2,$str1,$str); //str2查找的值，str1替换的值，str范围 ?>

$str2=”Someone”;

$str1="**";

$str=”The address of such-and-such website is www.hzhuti.com. Such-and-such website mainly records some notes and reflections on learning PHP and various software knowledge”;

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$arr = array("blue","red","green","yellow"); print_r(str_ireplace("red","pink",$arr,$i)); echo "Replacements: $i"; ?> 输出： Array ( [0] => blue [1] => pink [2] => green [3] => yellow )

echo str_ireplace($str2,$str1,$str); //The value found by str2, the value replaced by str1, str range

?>

In this example we will demonstrate the str_ireplace() function with an array and count variable:

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$find = array("Hello","world"); $replace = array("B"); $arr = array("Hello","world","!"); print_r(str_ireplace($find,$replace,$arr)); ?>输出： Array ( [0] => B [1] => [2] => ! )

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$arr = array("blue","red","green","yellow");
print_r(str_ireplace("red","pink",$arr,$i));
echo "Replacements: $i";
?>

Output:

Array

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substr_replace('eggs','x',-1,-1); //eggxs substr_replace('eggs','x',-1,-2); //eggxs substr_replace('eggs','x',-1,-2); //eggxs ?> Same as: substr_replace('eggs','x',-1,0); //eggxs ?> substr_replace('huevos','x',-2,-2); //huevxos substr_replace('huevos','x',-2,-3); //huevxos substr_replace('huevos','x',-2,-3); //huevxos ?> Same as: substr_replace('huevos','x',-2,0); //huevxos ?>

( [0] => blue [1] => pink [2] => green [3] => yellow )

Replacements: 1Example 3

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$find = array("Hello","world");<🎜> $replace = array("B");<🎜> $arr = array("Hello","world","!");<🎜> print_r(str_ireplace($find,$replace,$arr));<🎜> ?>Output: Array ( [0] => B [1] => [2] => ! )

substr_replace() function Replace part of the string in the specified string, syntax: string substr_replace(string str,string repl,int start,[int length]) Parameter str: Specifies the original string to be operated on. Parameter repl: a necessary parameter, specifying the new string after replacement. Parameter start: Specifies the starting position of the replacement string. Parameter length: Specifies the length of the returned string. Example:

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substr_replace('eggs','x',-1,-1); //eggxs <🎜> substr_replace('eggs','x',-1,-2); //eggxs <🎜> substr_replace('eggs','x',-1,-2); //eggxs <🎜> ?> Same as: substr_replace('eggs','x',-1,0); //eggxs <🎜> ?> substr_replace('huevos','x',-2,-2); //huevxos <🎜> substr_replace('huevos','x',-2,-3); //huevxos <🎜> substr_replace('huevos','x',-2,-3); //huevxos <🎜> ?> Same as: substr_replace('huevos','x',-2,0); //huevxos <🎜> ?>

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http://www.bkjia.com/PHPjc/631687.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631687.htmlTechArticleThis article tells PHP beginners about two example character replacement functions in PHP, one is str_ireplace() and the other The two functions of substr_replace() are relatively easy to use. Please refer to them if necessary. Characters...