PHP string substitution function _php Tutorial

This article to PHP beginners to talk about two examples of PHP character substitution function, one is str_ireplace () one is substr_replace () These two functions are more useful, there is a need for reference.

String substitution techniques can be implemented using the following two common functions: the Str_ireplace () function and the Substr_replace () function
Str_ireplace () function
Replaces the string that is specified in the original string with the new substring, with the syntax:
Mixed str_ireplace (mixed search,mixed replace,mixed Subject[,int&count])
Parameter search: The necessary parameters, specifying the string to find.
Parameter replace: The required parameter, specifying the value to replace.
Parameter subject: Required parameter, specifies the scope of the lookup.
Parameter count: Optional parameter, (optional parameter with brackets), gets the number of execution substitutions.

Instance:

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$str 2 = "xxx"; $STR 1 = "* *"; $str = "The address of a site is www.hzhuti.com, such as a website mainly record some learning PHP notes and impressions and a variety of software knowledge"; Echo Str_ireplace ($str 2, $str 1, $STR); STR2 Lookup value, str1 replacement value, str range ?>

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

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$arr = Array ("Blue", "Red", "green", "yellow"); Print_r (Str_ireplace ("Red", "pink", $arr, $i)); echo "Replacements: $i"; ?> Output: Array ( [0] = Blue [1] = Pink [2] = Green [3] = Yellow )

replacements:1 Example 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
Replaces the partial string in the specified string with the syntax:
String Substr_replace (String str,string repl,int start,[int length])
Parameter str: Specifies the original string to manipulate.
Parameter REPL: The necessary parameter that specifies the new string after replacement.
Parameter start: Specifies where the replacement string begins.
Argument Length: Specifies the length of the string returned.
Instance:

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"!--? php substr_replace (' Eggs ', ' x ', -1,-1); EGGXS substr_replace (' Eggs ', ' x ', -1,-2);//eggxs Substr_replace (' Eggs ', ' x ', -1,-2);//eggxs ?> Same as : !--? php substr_replace (' Eggs ', ' x ', -1,0);//eggxs . !--? php substr_replac E (' Huevos ', ' x ', -2,-2); Huevxos Substr_replace (' Huevos ', ' x ', -2,-3);//huevxos Substr_replace (' Huevos ', ' x ', -2,-3);//huevxos ? > Same as: !--? php substr_replace (' Huevos ', ' x ', -2,0);//huevxos ?

For more detailed information, please see: http://www.bKjia.c0m/phper/21/32954.htm

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