ereg
(PHP 4, PHP 5)
ereg - 正则表达式匹配
警告
这个函数在PHP 5.3.0中是DEPRECATED,而在PHP 7.0.0中是REMOVED。
这个功能的替代方案包括:
- preg_match()Descriptionint ereg ( string $pattern , string $string [, array &$regs ] ) Searches a
string
for matches to the regular expression given inpattern
in a case-sensitive way. Parameterspattern
Case sensitive regular expression.string
The input string.regs
If matches are found for parenthesized substrings ofpattern
and the function is called with the third argumentregs
, the matches will be stored in the elements of the arrayregs
. $regs1 will contain the substring which starts at the first left parenthesis; $regs2 will contain the substring starting at the second, and so on. $regs0 will contain a copy of the complete string matched. Return Values Returns the length of the matched string if a match forpattern
was found instring
, orFALSE
if no matches were found or an error occurred. If the optional parameterregs
was not passed or the length of the matched string is 0, this function returns 1. ChangelogVersionDescription4.1.0Up to (and including) PHP 4.1.0 $regs will be filled with exactly ten elements, even though more or fewer than ten parenthesized substrings may actually have matched. This has no effect on ereg()'s ability to match more substrings. If no matches are found, $regs will not be altered by ereg().ExamplesExample #1 ereg() example The following code snippet takes a date in ISO format (YYYY-MM-DD) and prints it in DD.MM.YYYY format: <?php if (ereg ("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})", $date, $regs)) { echo "$regs[3].$regs[2].$regs[1]"; } else { echo "Invalid date format: $date"; } ?>See Also
- eregi() - Case insensitive regular expression match
- ereg_replace() - Replace regular expression
- eregi_replace() - Replace regular expression case insensitive
- preg_match() - Perform a regular expression match
- strpos() - Find the position of the first occurrence of a substring in a string
- strstr() - Find the first occurrence of a string
- quotemeta() - Quote meta characters
← ereg_replace
eregi_replace →
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