PHP adds backslash function Quotemeta () before some predefined characters in the string

Instance

To add a backslash before a predefined character:

<?PHP$STR = "Hello World". (Can you hear me?) "; echo Quotemeta ($STR);? >

Definition and usage

The Quotemeta () function adds a backslash before some of the predefined characters in the string.

Pre-defined characters:

• Period (.)

• Back slash (\)

• Plus (+)

• asterisk (*)

• Question mark (?)

• square brackets ([])

• Caret (^)

• Dollar sign ($)

• Parentheses (())

Tip: This function can be used to escape characters that have special meanings, such as (), [], and * in SQL.

Note: This function is binary safe.

Grammar

Quotemeta (String)

Parameter description

string is required. Specifies the string to check.

Technical details

Return value: A string that returns a reference metacharacters character.

PHP version: 4+

More examples

Example 1

Add a backslash before several predefined characters:

<?PHP$STR1 = "1 + 1 = 2"; $str 2 = "1 * 1 = 1"; $str 3 = "Could you borrow me 5$?"; $str 4 = "is not entertained?" (I am ...) "; $str 5 = "the caret [^] Looks like a hat!"; Echo Quotemeta ($str 1). " <br> "; Echo Quotemeta ($str 2)." <br> "; Echo Quotemeta ($str 3)." <br> "; Echo Quotemeta ($str 4)." <br> "; Echo Quotemeta ($str 5)." <br> ";?