{"id":1243,"date":"2025-10-20T15:59:30","date_gmt":"2025-10-20T07:59:30","guid":{"rendered":"https:\/\/www.zhaozhao123.cn\/php\/yycxsc\/1243.html"},"modified":"2025-10-20T15:59:30","modified_gmt":"2025-10-20T07:59:30","slug":"php%e5%88%a4%e6%96%ad%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%98%af%e5%90%a6%e4%bb%a5%e5%8f%b7%e5%bc%80%e5%a4%b4","status":"publish","type":"yycxsc","link":"https:\/\/www.zhaozhao123.cn\/php\/yycxsc\/1243.html","title":{"rendered":"php\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4ee5#\u53f7\u5f00\u5934"},"content":{"rendered":"

\u5728PHP\u4e2d\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4ee5#<\/code>\u53f7\u5f00\u5934\uff1a<\/p>

\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528 substr()<\/code> \u51fd\u6570<\/h2>
$str = \"#\u8fd9\u662f\u4e00\u4e2a\u6d4b\u8bd5\u5b57\u7b26\u4e32\";\nif (substr($str, 0, 1) === '#') {\n    echo \"\u5b57\u7b26\u4e32\u4ee5#\u53f7\u5f00\u5934\";\n} else {\n    echo \"\u5b57\u7b26\u4e32\u4e0d\u4ee5#\u53f7\u5f00\u5934\";\n}<\/code><\/pre>
\u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528 strpos()<\/code> \u51fd\u6570<\/h2>
$str = \"#\u8fd9\u662f\u4e00\u4e2a\u6d4b\u8bd5\u5b57\u7b26\u4e32\";\nif (strpos($str, '#') === 0) {\n    echo \"\u5b57\u7b26\u4e32\u4ee5#\u53f7\u5f00\u5934\";\n} else {\n    echo \"\u5b57\u7b26\u4e32\u4e0d\u4ee5#\u53f7\u5f00\u5934\";\n}<\/code><\/pre>
\u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f preg_match()<\/code><\/h2>
$str = \"#\u8fd9\u662f\u4e00\u4e2a\u6d4b\u8bd5\u5b57\u7b26\u4e32\";\nif (preg_match('\/^#\/', $str)) {\n    echo \"\u5b57\u7b26\u4e32\u4ee5#\u53f7\u5f00\u5934\";\n} else {\n    echo \"\u5b57\u7b26\u4e32\u4e0d\u4ee5#\u53f7\u5f00\u5934\";\n}<\/code><\/pre>
\u65b9\u6cd5\u56db\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u7d22\u5f15<\/h2>
$str = \"#\u8fd9\u662f\u4e00\u4e2a\u6d4b\u8bd5\u5b57\u7b26\u4e32\";\nif ($str[0] === '#') {\n    echo \"\u5b57\u7b26\u4e32\u4ee5#\u53f7\u5f00\u5934\";\n} else {\n    echo \"\u5b57\u7b26\u4e32\u4e0d\u4ee5#\u53f7\u5f00\u5934\";\n}<\/code><\/pre>
\u65b9\u6cd5\u4e94\uff1a\u4f7f\u7528 str_starts_with()<\/code> \u51fd\u6570\uff08PHP 8.0+\uff09<\/h2>
$str = \"#\u8fd9\u662f\u4e00\u4e2a\u6d4b\u8bd5\u5b57\u7b26\u4e32\";\nif (str_starts_with($str, '#')) {\n    echo \"\u5b57\u7b26\u4e32\u4ee5#\u53f7\u5f00\u5934\";\n} else {\n    echo \"\u5b57\u7b26\u4e32\u4e0d\u4ee5#\u53f7\u5f00\u5934\";\n}<\/code><\/pre>
\u5b8c\u6574\u793a\u4f8b<\/h2>
function startsWithHash($str) {\n    \/\/ \u65b9\u6cd51: \u4f7f\u7528 substr\n    if (substr($str, 0, 1) === '#') {\n        return true;\n    }\n    return false;\n\n    \/\/ \u6216\u8005\u65b9\u6cd52: \u4f7f\u7528 strpos\n    \/\/ return strpos($str, '#') === 0;\n\n    \/\/ \u6216\u8005\u65b9\u6cd53: \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\n    \/\/ return preg_match('\/^#\/', $str) === 1;\n}\n\n\/\/ \u6d4b\u8bd5\n$testString1 = \"#hello world\";\n$testString2 = \"hello #world\";\n\nvar_dump(startsWithHash($testString1)); \/\/ bool(true)\nvar_dump(startsWithHash($testString2)); \/\/ bool(false)<\/code><\/pre>
\u63a8\u8350\u4f7f\u7528<\/h2>
    \n
  • PHP 8.0+<\/strong>\uff1a\u4f7f\u7528 str_starts_with()<\/code>\uff0c\u6700\u7b80\u6d01\u9ad8\u6548<\/li>\n\n\n\n
  • PHP 7.x\u53ca\u4ee5\u4e0b<\/strong>\uff1a\u4f7f\u7528 substr()<\/code> \u6216 strpos()<\/code>\uff0c\u6027\u80fd\u8f83\u597d<\/li>\n<\/ul>
    \u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u4e3b\u8981\u53d6\u51b3\u4e8e\u4f60\u7684PHP\u7248\u672c\u548c\u4e2a\u4eba\u7f16\u7801\u4e60\u60ef\u3002<\/p>","protected":false},"excerpt":{"rendered":"
    \u5728PHP\u4e2d\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4ee5#\u53f7\u5f00\u5934\uff1a \u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528 substr() \u51fd\u6570 \u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528 strpos() \u51fd\u6570 \u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f preg_match() \u65b9\u6cd5\u56db\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u7d22\u5f15 \u65b9\u6cd5\u4e94\uff1a\u4f7f\u7528 str_starts_with() \u51fd\u6570\uff08PHP 8.0+\uff09 \u5b8c\u6574\u793a\u4f8b \u63a8\u8350\u4f7f\u7528 \u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u4e3b\u8981\u53d6\u51b3..<\/p>\n","protected":false},"author":1,"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":true},"tags":[],"yycxsc2nav":[2054],"tuisongtax":[],"class_list":["post-1243","yycxsc","type-yycxsc","status-publish","hentry","yycxsc2nav-zfc"],"acf":{"qian_art_seotitle":"","qian_art_seotitle_source":{"label":"SEO\u6807\u9898","type":"text","formatted_value":""},"qian_art_seokws":"","qian_art_seokws_source":{"label":"SEO\u5173\u952e\u8bcd","type":"text","formatted_value":""},"qian_art_stzhong":"\u5b57\u7b26\u4e32\u662f\u5426\u4ee5#\u53f7\u5f00\u5934","qian_art_stzhong_source":{"label":"\u4e2d | \u77ed\u6807\u9898","type":"text","formatted_value":"\u5b57\u7b26\u4e32\u662f\u5426\u4ee5#\u53f7\u5f00\u5934"}},"_links":{"self":[{"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/yycxsc\/1243","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/yycxsc"}],"about":[{"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/types\/yycxsc"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/users\/1"}],"wp:attachment":[{"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/media?parent=1243"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/tags?post=1243"},{"taxonomy":"yycxsc2nav","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/yycxsc2nav?post=1243"},{"taxonomy":"tuisongtax","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/tuisongtax?post=1243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}