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substr_replace(3) [php man page]


substr_replace - Replace text within a portion of a string

mixed substr_replace (mixed $string, mixed $replacement, mixed $start, [mixed $length]) DESCRIPTION
substr_replace(3) replaces a copy of $string delimited by the $start and (optionally) $length parameters with the string given in $replace- ment. PARAMETERS
o $string - The input string. An array of strings can be provided, in which case the replacements will occur on each string in turn. In this case, the $replacement, $start and $length parameters may be provided either as scalar values to be applied to each input string in turn, or as arrays, in which case the corresponding array element will be used for each input string. o $replacement - The replacement string. o $start - If $start is positive, the replacing will begin at the $start'th offset into $string. If $start is negative, the replacing will begin at the $start'th character from the end of $string. o $length - If given and is positive, it represents the length of the portion of $string which is to be replaced. If it is negative, it rep- resents the number of characters from the end of $string at which to stop replacing. If it is not given, then it will default to strlen( $string ); i.e. end the replacing at the end of $string. Of course, if $length is zero then this function will have the effect of inserting $replacement into $string at the given $start offset. RETURN VALUES
The result string is returned. If $string is an array then array is returned. EXAMPLES
Example #1 Simple substr_replace(3) examples <?php $var = 'ABCDEFGH:/MNRPQR/'; echo "Original: $var<hr /> "; /* These two examples replace all of $var with 'bob'. */ echo substr_replace($var, 'bob', 0) . "<br /> "; echo substr_replace($var, 'bob', 0, strlen($var)) . "<br /> "; /* Insert 'bob' right at the beginning of $var. */ echo substr_replace($var, 'bob', 0, 0) . "<br /> "; /* These next two replace 'MNRPQR' in $var with 'bob'. */ echo substr_replace($var, 'bob', 10, -1) . "<br /> "; echo substr_replace($var, 'bob', -7, -1) . "<br /> "; /* Delete 'MNRPQR' from $var. */ echo substr_replace($var, '', 10, -1) . "<br /> "; ?> Example #2 Using substr_replace(3) to replace multiple strings at once <?php $input = array('A: XXX', 'B: XXX', 'C: XXX'); // A simple case: replace XXX in each string with YYY. echo implode('; ', substr_replace($input, 'YYY', 3, 3))." "; // A more complicated case where each replacement is different. $replace = array('AAA', 'BBB', 'CCC'); echo implode('; ', substr_replace($input, $replace, 3, 3))." "; // Replace a different number of characters each time. $length = array(1, 2, 3); echo implode('; ', substr_replace($input, $replace, 3, $length))." "; ?> The above example will output: A: YYY; B: YYY; C: YYY A: AAA; B: BBB; C: CCC A: AAAXX; B: BBBX; C: CCC NOTES
Note This function is binary-safe. SEE ALSO
str_replace(3), substr(3), String access and modification by character. PHP Documentation Group SUBSTR_REPLACE(3)

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INTVAL(3)								 1								 INTVAL(3)

intval - Get the integer value of a variable

int intval (mixed $var, [int $base = 10]) DESCRIPTION
Returns the integer value of $var, using the specified $base for the conversion (the default is base 10). intval(3) should not be used on objects, as doing so will emit an E_NOTICE level error and return 1. PARAMETERS
o $var - The scalar value being converted to an integer o $base - The base for the conversion Note If $base is 0, the base used is determined by the format of $var: o if string includes a "0x" (or "0X") prefix, the base is taken as 16 (hex); otherwise, o if string starts with "0", the base is taken as 8 (octal); otherwise, o the base is taken as 10 (decimal). RETURN VALUES
The integer value of $var on success, or 0 on failure. Empty arrays return 0, non-empty arrays return 1. The maximum value depends on the system. 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647. So for example on such a system, intval('1000000000000') will return 2147483647. The maximum signed integer value for 64 bit systems is 9223372036854775807. Strings will most likely return 0 although this depends on the leftmost characters of the string. The common rules of integer casting apply. EXAMPLES
Example #1 intval(3) examples The following examples are based on a 32 bit system. <?php echo intval(42); // 42 echo intval(4.2); // 4 echo intval('42'); // 42 echo intval('+42'); // 42 echo intval('-42'); // -42 echo intval(042); // 34 echo intval('042'); // 42 echo intval(1e10); // 1410065408 echo intval('1e10'); // 1 echo intval(0x1A); // 26 echo intval(42000000); // 42000000 echo intval(420000000000000000000); // 0 echo intval('420000000000000000000'); // 2147483647 echo intval(42, 8); // 42 echo intval('42', 8); // 34 echo intval(array()); // 0 echo intval(array('foo', 'bar')); // 1 ?> NOTES
Note The $base parameter has no effect unless the $var parameter is a string. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | Throws E_NOTICE and returns 1, when an object is | | | passed to $var. | | | | +--------+---------------------------------------------------+ SEE ALSO
boolval(3), floatval(3), strval(3), settype(3), is_numeric(3), Type juggling, BCMath Arbitrary Precision Mathematics Functions. PHP Documentation Group INTVAL(3)

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