PHP substr()\u51fd\u6570\u53ef\u4ee5\u5206\u5272\u6587\u5b57\uff0c\u4f46\u8981\u5206\u5272\u7684\u6587\u5b57\u5982\u679c\u5305\u62ec\u4e2d\u6587\u5b57\u7b26\u5f80\u5f80\u4f1a\u9047\u5230\u95ee\u9898\uff0c\u8fd9\u65f6\u53ef\u4ee5\u7528mb_substr()\/mb_strcut\u8fd9\u4e2a\u51fd\u6570\uff0cmb_substr() \/mb_strcut\u7684\u7528\u6cd5\u4e0esubstr()\u76f8\u4f3c\uff0c\u53ea\u662f\u5728mb_substr()\/mb_strcut\u6700\u540e\u8981\u52a0\u5165\u591a\u4e00\u4e2a\u53c2\u6570\uff0c\u4ee5\u8bbe\u5b9a\u5b57\u7b26\u4e32\u7684\u7f16\u7801\uff0c\u4f46\u662f\u4e00\u822c\u7684\u670d\u52a1\u5668\u90fd\u6ca1\u6253\u5f00php_mbstring.dll\uff0c\u9700\u8981\u5728php.ini\u5728\u628aphp_mbstring.dll\u6253\u5f00\u3002<\/p>\n
\u4e3e\u4e2a\u4f8b\u5b50\uff1a
\n<?php
\necho mb_substr(‘\u8fd9\u6837\u4e00\u6765\u6211\u7684\u5b57\u7b26\u4e32\u5c31\u4e0d\u4f1a\u6709\u4e71\u7801^_^’, 0, 7, ‘utf-8’);
\n?>
\n\u8f93\u51fa\uff1a\u8fd9\u6837\u4e00\u6765\u6211\u7684\u5b57
\n<?php
\necho mb_strcut(‘\u8fd9\u6837\u4e00\u6765\u6211\u7684\u5b57\u7b26\u4e32\u5c31\u4e0d\u4f1a\u6709\u4e71\u7801^_^’, 0, 7, ‘utf-8’);
\n?>
\n\u8f93\u51fa\uff1a\u8fd9\u6837\u4e00
\n\u4ece\u4e0a\u9762\u7684\u4f8b\u5b50\u53ef\u4ee5\u770b\u51fa\uff0cmb_substr\u662f\u6309\u5b57\u6765\u5207\u5206\u5b57\u7b26\uff0c\u800cmb_strcut\u662f\u6309\u5b57\u8282\u6765\u5207\u5206\u5b57\u7b26\uff0c\u4f46\u662f\u90fd\u4e0d\u4f1a\u4ea7\u751f\u534a\u4e2a\u5b57\u7b26\u7684\u73b0\u8c61\u2026\u2026<\/p>\n
mbstring \u51fd\u6570\u7684\u8bf4\u660e\uff1a<\/p>\n
php\u7684mbstring\u6269\u5c55\u6a21\u5757\u63d0\u4f9b\u4e86\u591a\u5b57\u8282\u5b57\u7b26\u7684\u5904\u7406\u80fd\u529b\uff0c\u5e73\u5e38\u6700\u5e38\u7528\u7684\u5c31\u662f\u7528mbstring\u6765\u5207\u5206\u591a\u5b57\u8282\u7684\u4e2d\u6587\u5b57\u7b26\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u51fa\u73b0\u534a\u4e2a\u5b57\u7b26\u7684\u60c5\u51b5\uff0c\u7531\u4e8e\u662fphp\u7684\u6269\u5c55\uff0c\u5b83\u7684\u6027\u80fd\u4e5f\u8981\u6bd4\u4e00\u4e9b\u81ea\u5b9a\u4e49\u7684\u591a\u5b57\u8282\u5207\u5206\u51fd\u6570\u8981\u597d\u4e0a\u4e00\u4e9b\u3002<\/p>\n
mbstring extension\u63d0\u4f9b\u4e86\u51e0\u4e2a\u529f\u80fd\u7c7b\u4f3c\u7684\u51fd\u6570\uff0cmb_substr\u548cmb_strcut\uff0c\u770b\u770b\u624b\u518c\u4e0a\u5bf9\u5b83\u4eec\u7684\u89e3\u91ca\u3002<\/p>\n
mb_substr
\nmb_substr() returns the portion of str specified by the start and length parameters.<\/p>\n
mb_substr() performs multi-byte safe substr() operation based on number of characters. Position is counted from the beginning of str. First character’s position is 0. Second character position is 1, and so on.<\/p>\n
mb_strcut
\nmb_strcut() returns the portion of str specified by the start and length parameters.<\/p>\n
mb_strcut() performs equivalent operation as mb_substr() with different method. If start position is multi-byte character’s second byte or larger, it starts from first byte of multi-byte character.<\/p>\n
It subtracts string from str that is shorter than length AND character that is not part of multi-byte string or not being middle of shift sequence.<\/p>\n
\u518d\u4e3e\u4e2a\u4f8b\u5b50,\u6709\u4e00\u6bb5\u6587\u5b57, \u5206\u522b\u7528mb_substr\u548cmb_strcut\u6765\u505a\u5207\u5206:<\/p>\n
PLAIN TEXT
\nCODE:
\n<?php
\n$str = ‘\u6211\u662f\u4e00\u4e32\u6bd4\u8f83\u957f\u7684\u4e2d\u6587-www.webjx.com’;<\/p>\n
echo “mb_substr:” . mb_substr($str, 0, 6, ‘utf-8’);<\/p>\n
echo “<br>”;<\/p>\n
echo “mb_strcut:” . mb_strcut($str, 0, 6, ‘utf-8’);
\n?>
\n\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
mb_substr:\u6211\u662f\u4e00\u4e32\u6bd4\u8f83
\nmb_strcut:\u6211\u662f<\/p>\n","protected":false},"excerpt":{"rendered":"
PHP substr()\u51fd\u6570\u53ef\u4ee5\u5206\u5272\u6587\u5b57\uff0c\u4f46\u8981\u5206\u5272\u7684\u6587\u5b57\u5982\u679c\u5305\u62ec\u4e2d\u6587\u5b57\u7b26\u5f80\u5f80\u4f1a\u9047 … \u7ee7\u7eed\u9605\u8bfb